Hi\u1ec3u \u0111\u01a1n gi\u1ea3n:<\/p>\n
- \n
- VI c\u00e0ng cao:<\/strong> \u0111\u1ed9 nh\u1edbt thay \u0111\u1ed5i \u00edt h\u01a1n khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i.<\/li>\n
- VI c\u00e0ng th\u1ea5p:<\/strong> \u0111\u1ed9 nh\u1edbt thay \u0111\u1ed5i nhi\u1ec1u h\u01a1n khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i.<\/li>\n<\/ul>\n
Khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng, d\u1ea7u nh\u1edbt s\u1ebd tr\u1edf n\u00ean lo\u00e3ng h\u01a1n. V\u00e0 ng\u01b0\u1ee3c l\u1ea1i, khi nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m, d\u1ea7u s\u1ebd \u0111\u1eb7c h\u01a1n.<\/p>\n
D\u1ea7u c\u00f3 VI cao c\u00f3 xu h\u01b0\u1edbng duy tr\u00ec \u0111\u1ed9 nh\u1edbt \u1ed5n \u0111\u1ecbnh h\u01a1n trong ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i. \u0110\u00e2y l\u00e0 m\u1ed9t \u0111\u1eb7c t\u00ednh quan tr\u1ecdng b\u1edfi \u0111\u1ed9ng c\u01a1 xe m\u00e1y kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ed9t m\u1ee9c nhi\u1ec7t \u0111\u1ed9 c\u1ed1 \u0111\u1ecbnh. T\u1eeb l\u00fac v\u1eeba kh\u1edfi \u0111\u1ed9ng cho \u0111\u1ebfn khi \u0111\u1ed9ng c\u01a1 \u0111\u1ea1t nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh, nhi\u1ec7t \u0111\u1ed9 c\u1ee7a d\u1ea7u li\u00ean t\u1ee5c thay \u0111\u1ed5i.<\/p>\n
VI kh\u00f4ng ph\u1ea3i l\u00e0 \u0111\u1ed9 nh\u1edbt c\u1ee7a d\u1ea7u<\/h2>\n
\u0110\u00e2y l\u00e0 \u0111i\u1ec3m r\u1ea5t d\u1ec5 nh\u1ea7m l\u1eabn. VI kh\u00f4ng cho bi\u1ebft d\u1ea7u \u0111\u1eb7c hay lo\u00e3ng.<\/p>\n
V\u00ed d\u1ee5, c\u00e1c th\u00f4ng s\u1ed1 5W-30, 10W-30, 10W-40, 15W-40… l\u00e0 c\u1ea5p \u0111\u1ed9 nh\u1edbt SAE. Trong khi \u0111\u00f3, VI cho bi\u1ebft \u0111\u1ed9 nh\u1edbt c\u1ee7a d\u1ea7u thay \u0111\u1ed5i nhi\u1ec1u hay \u00edt khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i. V\u00ec v\u1eady, hai s\u1ea3n ph\u1ea9m c\u00f9ng mang c\u1ea5p \u0111\u1ed9 nh\u1edbt SAE 10W-40 ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 c\u00f3 ch\u1ec9 s\u1ed1 VI kh\u00e1c nhau.<\/p>\n
C\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01a1n gi\u1ea3n:<\/p>\n
SAE \u2192 cho bi\u1ebft d\u1ea7u thu\u1ed9c c\u1ea5p \u0111\u1ed9 nh\u1edbt n\u00e0o.<\/strong><\/p>\n
VI \u2192 cho bi\u1ebft \u0111\u1ed9 nh\u1edbt c\u1ee7a d\u1ea7u \u1ed5n \u0111\u1ecbnh ra sao khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i.<\/strong><\/p>\n
T\u1ea1i sao nhi\u1ec7t \u0111\u1ed9 l\u1ea1i \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn d\u1ea7u nh\u1edbt?<\/h2>\n
\u0110\u1ed9 nh\u1edbt c\u1ee7a d\u1ea7u thay \u0111\u1ed5i theo nhi\u1ec7t \u0111\u1ed9.<\/p>\n
Khi \u0111\u1ed9ng c\u01a1 c\u00f2n ngu\u1ed9i, d\u1ea7u c\u00f3 xu h\u01b0\u1edbng \u0111\u1eb7c h\u01a1n. Khi \u0111\u1ed9ng c\u01a1 n\u00f3ng l\u00ean, d\u1ea7u s\u1ebd d\u1ea7n tr\u1edf n\u00ean lo\u00e3ng h\u01a1n. \u0110\u00e2y l\u00e0 \u0111\u1eb7c t\u00ednh t\u1ef1 nhi\u00ean c\u1ee7a d\u1ea7u b\u00f4i tr\u01a1n. N\u1ebfu d\u1ea7u qu\u00e1 \u0111\u1eb7c khi \u0111\u1ed9ng c\u01a1 c\u00f2n ngu\u1ed9i, kh\u1ea3 n\u0103ng l\u01b0u th\u00f4ng c\u1ee7a d\u1ea7u \u0111\u1ebfn c\u00e1c chi ti\u1ebft c\u1ea7n b\u00f4i tr\u01a1n c\u00f3 th\u1ec3 b\u1ecb \u1ea3nh h\u01b0\u1edfng.<\/p>\n
Ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu d\u1ea7u tr\u1edf n\u00ean qu\u00e1 lo\u00e3ng khi \u0111\u1ed9ng c\u01a1 ho\u1ea1t \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 cao, kh\u1ea3 n\u0103ng duy tr\u00ec l\u1edbp m\u00e0ng d\u1ea7u b\u00f4i tr\u01a1n gi\u1eefa c\u00e1c chi ti\u1ebft chuy\u1ec3n \u0111\u1ed9ng<\/strong> c\u00f3 th\u1ec3 gi\u1ea3m. V\u00ec v\u1eady, kh\u1ea3 n\u0103ng duy tr\u00ec \u0111\u1ed9 nh\u1edbt ph\u00f9 h\u1ee3p trong ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh l\u00e0 m\u1ed9t \u0111\u1eb7c t\u00ednh quan tr\u1ecdng c\u1ee7a d\u1ea7u nh\u1edbt.<\/p>\n
Ch\u1ec9 s\u1ed1 VI \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh nh\u01b0 th\u1ebf n\u00e0o?<\/h2>\n
Ch\u1ec9 s\u1ed1 VI \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n d\u1ef1a tr\u00ean m\u1ed1i quan h\u1ec7 gi\u1eefa \u0111\u1ed9 nh\u1edbt \u0111\u1ed9ng h\u1ecdc c\u1ee7a d\u1ea7u \u1edf 40\u00b0C v\u00e0 100\u00b0C.<\/p>\n
Ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ednh ch\u1ec9 s\u1ed1 n\u00e0y l\u00e0 ti\u00eau chu\u1ea9n ASTM D2270.<\/p>\n
Khi xem b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a d\u1ea7u nh\u1edbt, b\u1ea1n th\u01b0\u1eddng s\u1ebd b\u1eaft g\u1eb7p:<\/p>\n
- \n
- Kinematic Viscosity @ 40\u00b0C:<\/strong> \u0110\u1ed9 nh\u1edbt \u0111\u1ed9ng h\u1ecdc \u1edf 40\u00b0C.<\/li>\n
- Kinematic Viscosity @ 100\u00b0C:<\/strong> \u0110\u1ed9 nh\u1edbt \u0111\u1ed9ng h\u1ecdc \u1edf 100\u00b0C.<\/li>\n
- Viscosity Index:<\/strong> Ch\u1ec9 s\u1ed1 \u0111\u1ed9 nh\u1edbt VI.<\/li>\n<\/ul>\n
\u0110\u1ed9 nh\u1edbt \u0111\u1ed9ng h\u1ecdc c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01a1n gi\u1ea3n l\u00e0 m\u1ed9t th\u00f4ng s\u1ed1 th\u1ec3 hi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ea3y c\u1ee7a d\u1ea7u d\u01b0\u1edbi t\u00e1c d\u1ee5ng c\u1ee7a tr\u1ecdng l\u1ef1c v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng \u0111\u01a1n v\u1ecb mm\u00b2\/s, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi cSt (centistokes).<\/p>\n
T\u1eeb c\u00e1c gi\u00e1 tr\u1ecb \u0111\u1ed9 nh\u1edbt \u1edf 40\u00b0C v\u00e0 100\u00b0C, ch\u1ec9 s\u1ed1 VI \u0111\u01b0\u1ee3c t\u00ednh theo ph\u01b0\u01a1ng ph\u00e1p ti\u00eau chu\u1ea9n.<\/p>\n
VI cao mang l\u1ea1i l\u1ee3i \u00edch g\u00ec?<\/h2>\n
1. Duy tr\u00ec \u0111\u1ed9 nh\u1edbt \u1ed5n \u0111\u1ecbnh h\u01a1n<\/h3>\n
\u0110\u00e2y l\u00e0 \u00fd ngh\u0129a quan tr\u1ecdng nh\u1ea5t c\u1ee7a VI.<\/p>\n
D\u1ea7u c\u00f3 VI cao c\u00f3 xu h\u01b0\u1edbng thay \u0111\u1ed5i \u0111\u1ed9 nh\u1edbt \u00edt h\u01a1n khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i, gi\u00fap duy tr\u00ec \u0111\u1eb7c t\u00ednh b\u00f4i tr\u01a1n \u1ed5n \u0111\u1ecbnh h\u01a1n trong ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 r\u1ed9ng.<\/p>\n
2. H\u1ed7 tr\u1ee3 kh\u1ea3 n\u0103ng b\u00f4i tr\u01a1n khi \u0111\u1ed9ng c\u01a1 n\u00f3ng<\/h3>\n
Khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng cao, d\u1ea7u s\u1ebd tr\u1edf n\u00ean lo\u00e3ng h\u01a1n.<\/p>\n
Kh\u1ea3 n\u0103ng duy tr\u00ec \u0111\u1ed9 nh\u1edbt ph\u00f9 h\u1ee3p gi\u00fap d\u1ea7u duy tr\u00ec l\u1edbp m\u00e0ng b\u00f4i tr\u01a1n gi\u1eefa c\u00e1c b\u1ec1 m\u1eb7t chuy\u1ec3n \u0111\u1ed9ng, g\u00f3p ph\u1ea7n h\u1ea1n ch\u1ebf ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp v\u00e0 ma s\u00e1t gi\u1eefa c\u00e1c chi ti\u1ebft kim lo\u1ea1i.<\/p>\n
3. Ph\u00f9 h\u1ee3p v\u1edbi \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh thay \u0111\u1ed5i<\/h3>\n
Xe m\u00e1y c\u00f3 th\u1ec3 ph\u1ea3i ho\u1ea1t \u0111\u1ed9ng trong nhi\u1ec1u \u0111i\u1ec1u ki\u1ec7n kh\u00e1c nhau nh\u01b0:<\/p>\n
- \n
- \u0110i qu\u00e3ng \u0111\u01b0\u1eddng ng\u1eafn.<\/li>\n
- Di chuy\u1ec3n li\u00ean t\u1ee5c trong th\u00e0nh ph\u1ed1.<\/li>\n
- Ch\u1ea1y \u0111\u01b0\u1eddng d\u00e0i.<\/li>\n
- Ch\u1edf t\u1ea3i.<\/li>\n
- V\u1eadn h\u00e0nh \u1edf v\u00f2ng tua cao.<\/li>\n
- Th\u01b0\u1eddng xuy\u00ean t\u0103ng gi\u1ea3m t\u1ed1c.<\/li>\n<\/ul>\n
Trong nh\u1eefng \u0111i\u1ec1u ki\u1ec7n n\u00e0y, nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed9ng c\u01a1 v\u00e0 d\u1ea7u nh\u1edbt c\u00f3 th\u1ec3 li\u00ean t\u1ee5c thay \u0111\u1ed5i. V\u00ec v\u1eady, kh\u1ea3 n\u0103ng duy tr\u00ec \u0111\u1ed9 nh\u1edbt \u1ed5n \u0111\u1ecbnh khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i l\u00e0 m\u1ed9t \u0111\u1eb7c t\u00ednh \u0111\u00e1ng quan t\u00e2m.<\/p>\n
D\u1ea7u t\u1ed5ng h\u1ee3p c\u00f3 ch\u1ec9 s\u1ed1 VI cao h\u01a1n d\u1ea7u kho\u00e1ng kh\u00f4ng?<\/h2>\n
D\u1ea7u g\u1ed1c l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn ch\u1ec9 s\u1ed1 VI c\u1ee7a d\u1ea7u nh\u1edbt<\/strong>. Theo h\u1ec7 th\u1ed1ng ph\u00e2n lo\u1ea1i d\u1ea7u g\u1ed1c, m\u1ed7i nh\u00f3m d\u1ea7u c\u00f3 nh\u1eefng \u0111\u1eb7c t\u00ednh kh\u00e1c nhau.<\/p>\n
Nh\u00f3m I v\u00e0 Nh\u00f3m II<\/strong> l\u00e0 c\u00e1c lo\u1ea1i d\u1ea7u g\u1ed1c kho\u00e1ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong d\u1ea7u b\u00f4i tr\u01a1n. Ch\u1ec9 s\u1ed1 VI ph\u1ee5 thu\u1ed9c v\u00e0o th\u00e0nh ph\u1ea7n v\u00e0 m\u1ee9c \u0111\u1ed9 tinh ch\u1ebf c\u1ee7a t\u1eebng lo\u1ea1i d\u1ea7u g\u1ed1c.<\/p>\n
Nh\u00f3m III<\/strong> \u0111\u01b0\u1ee3c tinh ch\u1ebf s\u00e2u h\u01a1n v\u00e0 th\u01b0\u1eddng c\u00f3 ch\u1ec9 s\u1ed1 VI cao. \u0110\u00e2y l\u00e0 lo\u1ea1i d\u1ea7u g\u1ed1c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u s\u1ea3n ph\u1ea9m d\u1ea7u nh\u1edbt hi\u1ec7n \u0111\u1ea1i.<\/p>\n
Nh\u00f3m IV – PAO (Polyalphaolefin)<\/strong> l\u00e0 d\u1ea7u g\u1ed1c t\u1ed5ng h\u1ee3p c\u00f3 ch\u1ec9 s\u1ed1 VI t\u1ef1 nhi\u00ean cao v\u00e0 c\u00f3 \u0111\u1eb7c t\u00ednh t\u1ed1t trong ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 r\u1ed9ng.<\/p>\n
Ngo\u00e0i ra c\u00f2n c\u00f3 Nh\u00f3m V<\/strong>, bao g\u1ed3m nhi\u1ec1u lo\u1ea1i d\u1ea7u g\u1ed1c kh\u00e1c kh\u00f4ng thu\u1ed9c Nh\u00f3m I \u0111\u1ebfn IV, trong \u0111\u00f3 c\u00f3 Ester<\/strong>.<\/p>\n
Nh\u00ecn chung, d\u1ea7u g\u1ed1c t\u1ed5ng h\u1ee3p ho\u1eb7c d\u1ea7u g\u1ed1c \u0111\u01b0\u1ee3c tinh ch\u1ebf s\u00e2u c\u00f3 th\u1ec3 s\u1edf h\u1eefu VI t\u1ef1 nhi\u00ean cao h\u01a1n m\u1ed9t s\u1ed1 lo\u1ea1i d\u1ea7u g\u1ed1c kho\u00e1ng truy\u1ec1n th\u1ed1ng.<\/p>\n
Tuy nhi\u00ean, kh\u00f4ng n\u00ean ch\u1ec9 d\u1ef1a v\u00e0o lo\u1ea1i d\u1ea7u g\u1ed1c ho\u1eb7c ch\u1ec9 s\u1ed1 VI \u0111\u1ec3 k\u1ebft lu\u1eadn ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t s\u1ea3n ph\u1ea9m d\u1ea7u nh\u1edbt, b\u1edfi hi\u1ec7u n\u0103ng th\u1ef1c t\u1ebf c\u00f2n ph\u1ee5 thu\u1ed9c v\u00e0o c\u00f4ng th\u1ee9c, h\u1ec7 ph\u1ee5 gia, ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt v\u00e0 m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng c\u1ee7a s\u1ea3n ph\u1ea9m.<\/p>\n
VI cao c\u00f3 ph\u1ea3i d\u1ea7u nh\u1edbt c\u00e0ng t\u1ed1t?<\/h2>\n
Kh\u00f4ng ho\u00e0n to\u00e0n.<\/p>\n
\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng \u0111i\u1ec1u quan tr\u1ecdng nh\u1ea5t c\u1ea7n hi\u1ec3u khi \u0111\u1ecdc th\u00f4ng s\u1ed1 VI.<\/p>\n
M\u1ed9t s\u1ea3n ph\u1ea9m c\u00f3 VI cao cho th\u1ea5y \u0111\u1ed9 nh\u1edbt c\u1ee7a d\u1ea7u \u00edt thay \u0111\u1ed5i h\u01a1n khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i. Tuy nhi\u00ean, VI ch\u1ec9 ph\u1ea3n \u00e1nh m\u1ed9t \u0111\u1eb7c t\u00ednh c\u1ee7a d\u1ea7u nh\u1edbt ch\u1ee9 kh\u00f4ng ph\u1ea3i th\u01b0\u1edbc \u0111o t\u1ed5ng th\u1ec3 v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m.<\/p>\n
Ch\u1ec9 s\u1ed1 VI kh\u00f4ng tr\u1ef1c ti\u1ebfp cho bi\u1ebft:<\/p>\n
- \n
- Kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n.<\/li>\n
- Kh\u1ea3 n\u0103ng ch\u1ed1ng oxy h\u00f3a.<\/li>\n
- Kh\u1ea3 n\u0103ng l\u00e0m s\u1ea1ch \u0111\u1ed9ng c\u01a1.<\/li>\n
- Kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t c\u1eb7n b\u1ea9n.<\/li>\n
- \u0110\u1ed9 bay h\u01a1i c\u1ee7a d\u1ea7u.<\/li>\n
- Kh\u1ea3 n\u0103ng gi\u1eef \u0111\u1ed9 nh\u1edbt trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh.<\/li>\n
- Kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 ly h\u1ee3p \u01b0\u1edbt.<\/li>\n
- Tu\u1ed5i th\u1ecd th\u1ef1c t\u1ebf c\u1ee7a d\u1ea7u.<\/li>\n
- M\u1ee9c \u0111\u1ed9 ph\u00f9 h\u1ee3p v\u1edbi t\u1eebng lo\u1ea1i \u0111\u1ed9ng c\u01a1.<\/li>\n<\/ul>\n
Do \u0111\u00f3, kh\u00f4ng n\u00ean ch\u1ec9 nh\u00ecn v\u00e0o VI r\u1ed3i k\u1ebft lu\u1eadn:<\/p>\n
\u201cVI 180 ch\u1eafc ch\u1eafn t\u1ed1t h\u01a1n VI 160.\u201d<\/strong><\/p>\n
N\u1ebfu ch\u1ec9 x\u00e9t ri\u00eang kh\u1ea3 n\u0103ng duy tr\u00ec \u0111\u1ed9 nh\u1edbt khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i, VI 180 th\u1ec3 hi\u1ec7n m\u1ee9c thay \u0111\u1ed5i \u0111\u1ed9 nh\u1edbt th\u1ea5p h\u01a1n VI 160.<\/p>\n
Nh\u01b0ng hai s\u1ea3n ph\u1ea9m c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng d\u1ea7u g\u1ed1c, h\u1ec7 ph\u1ee5 gia, c\u1ea5p \u0111\u1ed9 nh\u1edbt SAE v\u00e0 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho nh\u1eefng \u1ee9ng d\u1ee5ng ho\u00e0n to\u00e0n kh\u00e1c nhau. V\u00ec v\u1eady, mu\u1ed1n \u0111\u00e1nh gi\u00e1 d\u1ea7u nh\u1edbt c\u1ea7n xem x\u00e9t nhi\u1ec1u th\u00f4ng s\u1ed1 kh\u00e1c c\u00f9ng l\u00fac.<\/p>\n
Khi ch\u1ecdn d\u1ea7u nh\u1edbt xe m\u00e1y n\u00ean xem nh\u1eefng th\u00f4ng s\u1ed1 n\u00e0o?<\/h2>\n
Thay v\u00ec ch\u1ec9 quan t\u00e2m \u0111\u1ebfn VI, ng\u01b0\u1eddi s\u1eed d\u1ee5ng n\u00ean xem x\u00e9t t\u1ed5ng th\u1ec3 c\u00e1c th\u00f4ng s\u1ed1 v\u00e0 ti\u00eau chu\u1ea9n c\u1ee7a s\u1ea3n ph\u1ea9m.<\/p>\n
\u0110\u1ed1i v\u1edbi d\u1ea7u nh\u1edbt xe m\u00e1y, m\u1ed9t s\u1ed1 th\u00f4ng tin quan tr\u1ecdng g\u1ed3m:<\/p>\n
C\u1ea5p \u0111\u1ed9 nh\u1edbt SAE<\/h3>\n
V\u00ed d\u1ee5: 5W-30, 10W-30, 10W-40…<\/p>\n
N\u00ean l\u1ef1a ch\u1ecdn c\u1ea5p \u0111\u1ed9 nh\u1edbt ph\u00f9 h\u1ee3p v\u1edbi khuy\u1ebfn ngh\u1ecb c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t xe.<\/p>\n
Ti\u00eau chu\u1ea9n API<\/h3>\n
API<\/strong> l\u00e0 h\u1ec7 th\u1ed1ng ph\u00e2n lo\u1ea1i c\u1ea5p hi\u1ec7u n\u0103ng c\u1ee7a d\u1ea7u \u0111\u1ed9ng c\u01a1 do American Petroleum Institute (Vi\u1ec7n D\u1ea7u kh\u00ed Hoa K\u1ef3)<\/strong> x\u00e2y d\u1ef1ng.<\/p>\n
Tr\u00ean c\u00e1c s\u1ea3n ph\u1ea9m d\u1ea7u nh\u1edbt xe m\u00e1y, b\u1ea1n c\u00f3 th\u1ec3 b\u1eaft g\u1eb7p nh\u1eefng c\u1ea5p hi\u1ec7u n\u0103ng nh\u01b0 API SL, SM, SN, SP…<\/strong><\/p>\n
Ti\u00eau chu\u1ea9n JASO<\/h3>\n
\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng ti\u00eau chu\u1ea9n \u0111\u1eb7c bi\u1ec7t \u0111\u00e1ng ch\u00fa \u00fd khi l\u1ef1a ch\u1ecdn d\u1ea7u nh\u1edbt xe m\u00e1y.<\/p>\n
V\u00ed d\u1ee5:<\/p>\n
- \n
- JASO MA\/MA2:<\/strong> th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho xe m\u00e1y c\u00f3 h\u1ec7 th\u1ed1ng ly h\u1ee3p \u01b0\u1edbt.<\/li>\n
- JASO MB:<\/strong> th\u01b0\u1eddng g\u1eb7p tr\u00ean d\u1ea7u \u0111\u1ed9ng c\u01a1 d\u00e0nh cho xe tay ga c\u00f3 h\u1ec7 truy\u1ec1n \u0111\u1ed9ng t\u00e1ch bi\u1ec7t v\u1edbi d\u1ea7u \u0111\u1ed9ng c\u01a1.<\/li>\n<\/ul>\n
\u0110\u1ed9 nh\u1edbt \u0111\u1ed9ng h\u1ecdc \u1edf 40\u00b0C v\u00e0 100\u00b0C<\/h3>\n
Hai th\u00f4ng s\u1ed1 n\u00e0y cho bi\u1ebft \u0111\u1ed9 nh\u1edbt \u0111\u1ed9ng h\u1ecdc th\u1ef1c t\u1ebf c\u1ee7a d\u1ea7u t\u1ea1i hai m\u1ee9c nhi\u1ec7t \u0111\u1ed9 th\u1eed nghi\u1ec7m.<\/p>\n
Khi so s\u00e1nh nh\u1eefng s\u1ea3n ph\u1ea9m c\u00f9ng c\u1ea5p SAE, \u0111\u00e2y l\u00e0 nh\u1eefng th\u00f4ng s\u1ed1 h\u1eefu \u00edch \u0111\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n \u0111\u1eb7c t\u00ednh \u0111\u1ed9 nh\u1edbt c\u1ee7a t\u1eebng lo\u1ea1i d\u1ea7u.<\/p>\n
Ch\u1ec9 s\u1ed1 \u0111\u1ed9 nh\u1edbt VI<\/h3>\n
VI cho bi\u1ebft m\u1ee9c \u0111\u1ed9 thay \u0111\u1ed5i \u0111\u1ed9 nh\u1edbt c\u1ee7a d\u1ea7u khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i.<\/p>\n
\u0110\u00e2y l\u00e0 m\u1ed9t th\u00f4ng s\u1ed1 h\u1eefu \u00edch khi t\u00ecm hi\u1ec3u \u0111\u1eb7c t\u00ednh c\u1ee7a d\u1ea7u, nh\u01b0ng kh\u00f4ng n\u00ean s\u1eed d\u1ee5ng ri\u00eang VI \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 to\u00e0n b\u1ed9 ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m.<\/p>\n
Ngo\u00e0i ra, d\u1ea7u nh\u1edbt c\u00f2n c\u00f3 nhi\u1ec1u th\u00f4ng s\u1ed1 chuy\u00ean s\u00e2u kh\u00e1c li\u00ean quan \u0111\u1ebfn kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 khi \u0111\u1ed9ng c\u01a1 n\u00f3ng, \u0111\u1ed9 bay h\u01a1i, kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t axit v\u00e0 nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c c\u1ee7a d\u1ea7u. Nh\u1eefng th\u00f4ng s\u1ed1 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f4ng b\u1ed1 trong b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a s\u1ea3n ph\u1ea9m.<\/p>\n
C\u00f3 n\u00ean ch\u1ecdn d\u1ea7u c\u00f3 VI cao?<\/h2>\n
VI cao l\u00e0 m\u1ed9t \u0111\u1eb7c t\u00ednh \u0111\u00e1ng quan t\u00e2m, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi d\u1ea7u ph\u1ea3i ho\u1ea1t \u0111\u1ed9ng trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i l\u1edbn.<\/p>\n
Tuy nhi\u00ean, khi l\u1ef1a ch\u1ecdn d\u1ea7u nh\u1edbt cho xe m\u00e1y, nguy\u00ean t\u1eafc quan tr\u1ecdng v\u1eabn l\u00e0:<\/p>\n
\u0110\u00fang c\u1ea5p \u0111\u1ed9 nh\u1edbt + \u0110\u00fang ti\u00eau chu\u1ea9n + \u0110\u00fang y\u00eau c\u1ea7u c\u1ee7a \u0111\u1ed9ng c\u01a1.<\/strong><\/p>\n
M\u1ed9t lo\u1ea1i d\u1ea7u c\u00f3 VI r\u1ea5t cao nh\u01b0ng kh\u00f4ng \u0111\u00e1p \u1ee9ng c\u1ea5p \u0111\u1ed9 nh\u1edbt SAE ho\u1eb7c c\u00e1c ti\u00eau chu\u1ea9n m\u00e0 \u0111\u1ed9ng c\u01a1 y\u00eau c\u1ea7u ch\u01b0a ch\u1eafc \u0111\u00e3 l\u00e0 l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p. V\u00ec v\u1eady, VI n\u00ean \u0111\u01b0\u1ee3c xem l\u00e0 m\u1ed9t ph\u1ea7n trong t\u1ed5ng th\u1ec3 c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, thay v\u00ec s\u1eed d\u1ee5ng nh\u01b0 ti\u00eau ch\u00ed duy nh\u1ea5t \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng d\u1ea7u nh\u1edbt.<\/p>\n
![\"\"](\"https:\/\/t24motorcare.com\/wp-content\/uploads\/2026\/08\/b1174b70-0878-4380-928d-2133813a1b2c-600x400.jpg\")
<\/p>\nK\u1ebft lu\u1eadn<\/h2>\n
Viscosity Index (VI) – Ch\u1ec9 s\u1ed1 \u0111\u1ed9 nh\u1edbt<\/strong> cho bi\u1ebft m\u1ee9c \u0111\u1ed9 thay \u0111\u1ed5i \u0111\u1ed9 nh\u1edbt c\u1ee7a d\u1ea7u khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i.<\/p>\n
C\u00f3 th\u1ec3 ghi nh\u1edb \u0111\u01a1n gi\u1ea3n:<\/p>\n
VI cao \u2192 \u0110\u1ed9 nh\u1edbt thay \u0111\u1ed5i \u00edt h\u01a1n khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i.<\/strong><\/p>\n
VI th\u1ea5p \u2192 \u0110\u1ed9 nh\u1edbt thay \u0111\u1ed5i nhi\u1ec1u h\u01a1n khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i.<\/strong><\/p>\n
Tuy nhi\u00ean: VI cao kh\u00f4ng \u0111\u1ed3ng ngh\u0129a d\u1ea7u nh\u1edbt \u0111\u00f3 ch\u1eafc ch\u1eafn t\u1ed1t h\u01a1n.<\/strong><\/p>\n
\u0110\u1ec3 l\u1ef1a ch\u1ecdn d\u1ea7u nh\u1edbt ph\u00f9 h\u1ee3p cho xe m\u00e1y, c\u1ea7n xem x\u00e9t \u0111\u1ed3ng th\u1eddi c\u1ea5p \u0111\u1ed9 nh\u1edbt SAE, ti\u00eau chu\u1ea9n API, JASO, c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a d\u1ea7u v\u00e0 \u0111\u1eb7c bi\u1ec7t l\u00e0 khuy\u1ebfn ngh\u1ecb c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t xe<\/strong>.<\/p>\n
Hi\u1ec3u \u0111\u00fang v\u1ec1 ch\u1ec9 s\u1ed1 VI s\u1ebd gi\u00fap ng\u01b0\u1eddi s\u1eed d\u1ee5ng \u0111\u1ecdc b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt d\u1ea7u nh\u1edbt ch\u00ednh x\u00e1c h\u01a1n v\u00e0 tr\u00e1nh quan ni\u1ec7m \u0111\u01a1n gi\u1ea3n r\u1eb1ng \u201cVI c\u00e0ng cao th\u00ec d\u1ea7u c\u00e0ng t\u1ed1t\u201d.<\/strong><\/p>\n
\n","protected":false},"excerpt":{"rendered":"
Ch\u1ec9 s\u1ed1 \u0111\u1ed9 nh\u1edbt VI l\u00e0 g\u00ec? VI c\u00e0ng cao c\u00f3 ph\u1ea3i d\u1ea7u nh\u1edbt c\u00e0ng t\u1ed1t? Khi xem th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a m\u1ed9t chai d\u1ea7u nh\u1edbt, ngo\u00e0i nh\u1eefng th\u00f4ng tin quen thu\u1ed9c nh\u01b0 SAE 10W-30, 10W-40, API hay JASO, b\u1ea1n c\u00f3 th\u1ec3 b\u1eaft g\u1eb7p m\u1ed9t th\u00f4ng s\u1ed1 kh\u00e1c l\u00e0 Viscosity Index (VI) – Ch\u1ec9<\/p>\n","protected":false},"author":2,"featured_media":1113,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[73],"tags":[],"class_list":["post-1112","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kien-thuc-dau-nhot"],"acf":[],"_links":{"self":[{"href":"https:\/\/t24motorcare.com\/index.php?rest_route=\/wp\/v2\/posts\/1112","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/t24motorcare.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/t24motorcare.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/t24motorcare.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/t24motorcare.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1112"}],"version-history":[{"count":3,"href":"https:\/\/t24motorcare.com\/index.php?rest_route=\/wp\/v2\/posts\/1112\/revisions"}],"predecessor-version":[{"id":1115,"href":"https:\/\/t24motorcare.com\/index.php?rest_route=\/wp\/v2\/posts\/1112\/revisions\/1115"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/t24motorcare.com\/index.php?rest_route=\/wp\/v2\/media\/1113"}],"wp:attachment":[{"href":"https:\/\/t24motorcare.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1112"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/t24motorcare.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1112"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/t24motorcare.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1112"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
- JASO MB:<\/strong> th\u01b0\u1eddng g\u1eb7p tr\u00ean d\u1ea7u \u0111\u1ed9ng c\u01a1 d\u00e0nh cho xe tay ga c\u00f3 h\u1ec7 truy\u1ec1n \u0111\u1ed9ng t\u00e1ch bi\u1ec7t v\u1edbi d\u1ea7u \u0111\u1ed9ng c\u01a1.<\/li>\n<\/ul>\n
- JASO MA\/MA2:<\/strong> th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho xe m\u00e1y c\u00f3 h\u1ec7 th\u1ed1ng ly h\u1ee3p \u01b0\u1edbt.<\/li>\n
- Kinematic Viscosity @ 100\u00b0C:<\/strong> \u0110\u1ed9 nh\u1edbt \u0111\u1ed9ng h\u1ecdc \u1edf 100\u00b0C.<\/li>\n
- VI c\u00e0ng th\u1ea5p:<\/strong> \u0111\u1ed9 nh\u1edbt thay \u0111\u1ed5i nhi\u1ec1u h\u01a1n khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i.<\/li>\n<\/ul>\n