{"id":9314,"date":"2026-01-30T09:13:15","date_gmt":"2026-01-30T09:13:15","guid":{"rendered":"https:\/\/yenhung.com\/?p=9314"},"modified":"2026-01-30T09:13:15","modified_gmt":"2026-01-30T09:13:15","slug":"dau-don-cap-va-dau-da-cap-khac-nhau-the-nao-cach-nhan-biet-va-lua-chon-dung-trong-thuc-te","status":"publish","type":"post","link":"https:\/\/yenhung.com\/?p=9314","title":{"rendered":"D\u1ea7u \u0111\u01a1n c\u1ea5p v\u00e0 d\u1ea7u \u0111a c\u1ea5p kh\u00e1c nhau th\u1ebf n\u00e0o? C\u00e1ch nh\u1eadn bi\u1ebft v\u00e0 l\u1ef1a ch\u1ecdn \u0111\u00fang trong th\u1ef1c t\u1ebf."},"content":{"rendered":"\n\n\n<p><strong>D\u1ea7u \u0111\u01a1n c\u1ea5p v\u00e0 d\u1ea7u \u0111a c\u1ea5p kh\u00e1c nhau th\u1ebf n\u00e0o? C\u00e1ch nh\u1eadn bi\u1ebft v\u00e0 l\u1ef1a ch\u1ecdn \u0111\u00fang trong th\u1ef1c t\u1ebf<\/strong><\/p>\n\n\n\n<p>Trong l\u0129nh v\u1ef1c d\u1ea7u b\u00f4i tr\u01a1n, kh\u00e1i ni\u1ec7m d\u1ea7u \u0111\u01a1n c\u1ea5p v\u00e0 d\u1ea7u \u0111a c\u1ea5p xu\u1ea5t hi\u1ec7n r\u1ea5t th\u01b0\u1eddng xuy\u00ean, \u0111\u1eb7c bi\u1ec7t trong d\u1ea7u \u0111\u1ed9ng c\u01a1, d\u1ea7u th\u1ee7y l\u1ef1c v\u00e0 d\u1ea7u c\u00f4ng nghi\u1ec7p. Tuy nhi\u00ean, kh\u00f4ng \u00edt ng\u01b0\u1eddi v\u1eabn nh\u1ea7m l\u1eabn hai lo\u1ea1i n\u00e0y ch\u1ec9 kh\u00e1c nhau v\u1ec1 t\u00ean g\u1ecdi, trong khi tr\u00ean th\u1ef1c t\u1ebf s\u1ef1 kh\u00e1c bi\u1ec7t n\u1eb1m \u1edf b\u1ea3n ch\u1ea5t \u0111\u1ed9 nh\u1edbt theo nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn hi\u1ec7u qu\u1ea3 b\u00f4i tr\u01a1n c\u0169ng nh\u01b0 tu\u1ed5i th\u1ecd thi\u1ebft b\u1ecb. Vi\u1ec7c hi\u1ec3u r\u00f5 d\u1ea7u \u0111\u01a1n c\u1ea5p v\u00e0 d\u1ea7u \u0111a c\u1ea5p s\u1ebd gi\u00fap ng\u01b0\u1eddi s\u1eed d\u1ee5ng l\u1ef1a ch\u1ecdn \u0111\u00fang lo\u1ea1i d\u1ea7u cho t\u1eebng \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh.<\/p>\n\n\n\n<p>D\u1ea7u \u0111\u01a1n c\u1ea5p (single-grade oil) l\u00e0 lo\u1ea1i d\u1ea7u ch\u1ec9 c\u00f3 m\u1ed9t c\u1ea5p \u0111\u1ed9 nh\u1edbt danh \u0111\u1ecbnh, \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh t\u1ea1i m\u1ed9t nhi\u1ec7t \u0111\u1ed9 ti\u00eau chu\u1ea9n. V\u1edbi d\u1ea7u \u0111\u1ed9ng c\u01a1, c\u1ea5p \u0111\u1ed9 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i theo ti\u00eau chu\u1ea9n SAE, v\u00ed d\u1ee5 SAE 30, SAE 40 ho\u1eb7c SAE 50. V\u1edbi d\u1ea7u c\u00f4ng nghi\u1ec7p, d\u1ea7u \u0111\u01a1n c\u1ea5p th\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i theo ISO VG nh\u01b0 ISO VG 32, 46, 68 ho\u1eb7c 100. \u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a d\u1ea7u \u0111\u01a1n c\u1ea5p l\u00e0 \u0111\u1ed9 nh\u1edbt thay \u0111\u1ed5i kh\u00e1 m\u1ea1nh khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i, ngh\u0129a l\u00e0 d\u1ea7u s\u1ebd \u0111\u1eb7c l\u00ean r\u00f5 r\u1ec7t khi l\u1ea1nh v\u00e0 lo\u00e3ng nhanh khi n\u00f3ng.<\/p>\n\n\n\n<p>D\u1ea7u \u0111a c\u1ea5p (multi-grade oil) l\u00e0 lo\u1ea1i d\u1ea7u \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u00e1p \u1ee9ng hai c\u1ea5p \u0111\u1ed9 nh\u1edbt kh\u00e1c nhau \u1edf hai m\u1ee9c nhi\u1ec7t \u0111\u1ed9, nh\u1edd s\u1eed d\u1ee5ng ph\u1ee5 gia c\u1ea3i thi\u1ec7n ch\u1ec9 s\u1ed1 \u0111\u1ed9 nh\u1edbt (Viscosity Index Improver \u2013 VII). Trong d\u1ea7u \u0111\u1ed9ng c\u01a1, d\u1ea7u \u0111a c\u1ea5p th\u01b0\u1eddng c\u00f3 d\u1ea1ng SAE 10W-30, 15W-40 ho\u1eb7c 5W-40. K\u00fd hi\u1ec7u n\u00e0y cho bi\u1ebft d\u1ea7u v\u1eabn \u0111\u1ee7 lo\u00e3ng \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p \u0111\u1ec3 kh\u1edfi \u0111\u1ed9ng d\u1ec5 d\u00e0ng, \u0111\u1ed3ng th\u1eddi v\u1eabn duy tr\u00ec \u0111\u1ed9 nh\u1edbt ph\u00f9 h\u1ee3p \u1edf nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c cao. V\u1edbi d\u1ea7u c\u00f4ng nghi\u1ec7p, kh\u00e1i ni\u1ec7m \u0111a c\u1ea5p \u00edt ph\u1ed5 bi\u1ebfn h\u01a1n nh\u01b0ng v\u1eabn t\u1ed3n t\u1ea1i \u1edf m\u1ed9t s\u1ed1 d\u00f2ng d\u1ea7u th\u1ee7y l\u1ef1c HV ho\u1eb7c d\u1ea7u c\u00f3 ch\u1ec9 s\u1ed1 \u0111\u1ed9 nh\u1edbt cao.<\/p>\n\n\n\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t c\u1ed1t l\u00f5i gi\u1eefa d\u1ea7u \u0111\u01a1n c\u1ea5p v\u00e0 d\u1ea7u \u0111a c\u1ea5p n\u1eb1m \u1edf kh\u1ea3 n\u0103ng \u1ed5n \u0111\u1ecbnh \u0111\u1ed9 nh\u1edbt theo nhi\u1ec7t \u0111\u1ed9. D\u1ea7u \u0111\u01a1n c\u1ea5p kh\u00f4ng ch\u1ee9a ho\u1eb7c ch\u1ee9a r\u1ea5t \u00edt ph\u1ee5 gia c\u1ea3i thi\u1ec7n ch\u1ec9 s\u1ed1 \u0111\u1ed9 nh\u1edbt, do \u0111\u00f3 \u0111\u1ed9 nh\u1edbt c\u1ee7a d\u1ea7u gi\u1ea3m nhanh khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng. Ng\u01b0\u1ee3c l\u1ea1i, d\u1ea7u \u0111a c\u1ea5p nh\u1edd c\u00f3 ph\u1ee5 gia VII n\u00ean h\u1ea1n ch\u1ebf s\u1ef1 gi\u1ea3m \u0111\u1ed9 nh\u1edbt khi d\u1ea7u n\u00f3ng l\u00ean, gi\u00fap m\u00e0ng d\u1ea7u \u1ed5n \u0111\u1ecbnh h\u01a1n trong d\u1ea3i nhi\u1ec7t \u0111\u1ed9 r\u1ed9ng. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng v\u1edbi c\u00e1c thi\u1ebft b\u1ecb th\u01b0\u1eddng xuy\u00ean kh\u1edfi \u0111\u1ed9ng ngu\u1ed9i ho\u1eb7c l\u00e0m vi\u1ec7c trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i l\u1edbn.<\/p>\n\n\n\n<p>V\u1ec1 \u01b0u \u0111i\u1ec3m, d\u1ea7u \u0111\u01a1n c\u1ea5p c\u00f3 c\u1ea5u tr\u00fac \u0111\u01a1n gi\u1ea3n, \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1eaft t\u1ed1t v\u00e0 \u00edt b\u1ecb suy gi\u1ea3m t\u00ednh ch\u1ea5t do ph\u1ee5 gia. V\u00ec v\u1eady, d\u1ea7u \u0111\u01a1n c\u1ea5p th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng trong c\u00e1c h\u1ec7 th\u1ed1ng c\u00f4ng nghi\u1ec7p l\u00e0m vi\u1ec7c \u1ed5n \u0111\u1ecbnh \u1edf m\u1ed9t d\u1ea3i nhi\u1ec7t \u0111\u1ed9 h\u1eb9p, ch\u1eb3ng h\u1ea1n nh\u01b0 h\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c nh\u00e0 x\u01b0\u1edfng, h\u1ed9p s\u1ed1 c\u00f4ng nghi\u1ec7p ho\u1eb7c m\u00e1y m\u00f3c v\u1eadn h\u00e0nh li\u00ean t\u1ee5c. Ngo\u00e0i ra, d\u1ea7u \u0111\u01a1n c\u1ea5p th\u01b0\u1eddng c\u00f3 gi\u00e1 th\u00e0nh th\u1ea5p h\u01a1n v\u00e0 d\u1ec5 ki\u1ec3m so\u00e1t t\u00ecnh tr\u1ea1ng d\u1ea7u trong b\u1ea3o tr\u00ec \u0111\u1ecbnh k\u1ef3.<\/p>\n\n\n\n<p>D\u1ea7u \u0111a c\u1ea5p c\u00f3 \u01b0u \u0111i\u1ec3m n\u1ed5i b\u1eadt l\u00e0 kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng t\u1ed1t v\u1edbi nhi\u1ec1u \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau. Trong d\u1ea7u \u0111\u1ed9ng c\u01a1, d\u1ea7u \u0111a c\u1ea5p gi\u00fap kh\u1edfi \u0111\u1ed9ng d\u1ec5 \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, \u0111\u1ed3ng th\u1eddi v\u1eabn b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1 khi l\u00e0m vi\u1ec7c \u1edf nhi\u1ec7t \u0111\u1ed9 cao. Tuy nhi\u00ean, do ch\u1ee9a ph\u1ee5 gia c\u1ea3i thi\u1ec7n ch\u1ec9 s\u1ed1 \u0111\u1ed9 nh\u1edbt, d\u1ea7u \u0111a c\u1ea5p c\u00f3 th\u1ec3 b\u1ecb suy gi\u1ea3m t\u00ednh ch\u1ea5t khi l\u00e0m vi\u1ec7c trong \u0111i\u1ec1u ki\u1ec7n c\u1eaft m\u1ea1nh ho\u1eb7c t\u1ea3i cao k\u00e9o d\u00e0i, \u0111\u1eb7c bi\u1ec7t trong m\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p n\u1eb7ng.<\/p>\n\n\n\n<p>C\u00e1ch nh\u1eadn bi\u1ebft d\u1ea7u \u0111\u01a1n c\u1ea5p v\u00e0 d\u1ea7u \u0111a c\u1ea5p t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u01a1n gi\u1ea3n n\u1ebfu quan s\u00e1t \u0111\u00fang th\u00f4ng tin tr\u00ean nh\u00e3n d\u1ea7u. V\u1edbi d\u1ea7u \u0111\u1ed9ng c\u01a1, d\u1ea7u \u0111\u01a1n c\u1ea5p ch\u1ec9 c\u00f3 m\u1ed9t con s\u1ed1 SAE, v\u00ed d\u1ee5 SAE 40, trong khi d\u1ea7u \u0111a c\u1ea5p lu\u00f4n c\u00f3 d\u1ea1ng hai con s\u1ed1 k\u00e8m ch\u1eef W \u1edf gi\u1eefa, v\u00ed d\u1ee5 15W-40. V\u1edbi d\u1ea7u c\u00f4ng nghi\u1ec7p, d\u1ea7u \u0111\u01a1n c\u1ea5p th\u01b0\u1eddng ch\u1ec9 ghi ISO VG 46, ISO VG 68 ho\u1eb7c t\u01b0\u01a1ng \u0111\u01b0\u01a1ng, trong khi d\u1ea7u \u0111a c\u1ea5p ho\u1eb7c d\u1ea7u c\u00f3 ch\u1ec9 s\u1ed1 \u0111\u1ed9 nh\u1edbt cao th\u01b0\u1eddng c\u00f3 th\u00eam k\u00fd hi\u1ec7u HV, VI cao ho\u1eb7c m\u00f4 t\u1ea3 r\u00f5 \u201chigh viscosity index\u201d trong t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt.<\/p>\n\n\n\n<p>Trong th\u1ef1c t\u1ebf l\u1ef1a ch\u1ecdn, d\u1ea7u \u0111\u01a1n c\u1ea5p ph\u00f9 h\u1ee3p v\u1edbi thi\u1ebft b\u1ecb l\u00e0m vi\u1ec7c \u1ed5n \u0111\u1ecbnh, nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng bi\u1ebfn \u0111\u1ed9ng l\u1edbn v\u00e0 y\u00eau c\u1ea7u \u0111\u1ed9 b\u1ec1n m\u00e0ng d\u1ea7u cao. D\u1ea7u \u0111a c\u1ea5p ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi \u0111\u1ed9ng c\u01a1, thi\u1ebft b\u1ecb di \u0111\u1ed9ng ho\u1eb7c h\u1ec7 th\u1ed1ng ph\u1ea3i kh\u1edfi \u0111\u1ed9ng ngu\u1ed9i th\u01b0\u1eddng xuy\u00ean v\u00e0 l\u00e0m vi\u1ec7c trong nhi\u1ec1u \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau. Vi\u1ec7c ch\u1ecdn sai lo\u1ea1i d\u1ea7u, v\u00ed d\u1ee5 d\u00f9ng d\u1ea7u \u0111a c\u1ea5p kh\u00f4ng ph\u00f9 h\u1ee3p cho h\u1ec7 th\u1ed1ng c\u00f4ng nghi\u1ec7p t\u1ea3i n\u1eb7ng, c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn suy gi\u1ea3m \u0111\u1ed9 nh\u1edbt v\u00e0 m\u00e0i m\u00f2n s\u1edbm.<\/p>\n\n\n\n<p>T\u00f3m l\u1ea1i, d\u1ea7u \u0111\u01a1n c\u1ea5p v\u00e0 d\u1ea7u \u0111a c\u1ea5p kh\u00e1c nhau ch\u1ee7 y\u1ebfu \u1edf kh\u1ea3 n\u0103ng duy tr\u00ec \u0111\u1ed9 nh\u1edbt theo nhi\u1ec7t \u0111\u1ed9. Hi\u1ec3u r\u00f5 b\u1ea3n ch\u1ea5t, c\u00e1ch nh\u1eadn bi\u1ebft v\u00e0 ph\u1ea1m vi \u1ee9ng d\u1ee5ng c\u1ee7a t\u1eebng lo\u1ea1i d\u1ea7u s\u1ebd gi\u00fap ng\u01b0\u1eddi s\u1eed d\u1ee5ng l\u1ef1a ch\u1ecdn \u0111\u00fang, \u0111\u1ea3m b\u1ea3o thi\u1ebft b\u1ecb v\u1eadn h\u00e0nh \u1ed5n \u0111\u1ecbnh, b\u1ec1n b\u1ec9 v\u00e0 t\u1ed1i \u01b0u chi ph\u00ed b\u1ea3o tr\u00ec trong d\u00e0i h\u1ea1n.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>D\u1ea7u \u0111\u01a1n c\u1ea5p v\u00e0 d\u1ea7u \u0111a c\u1ea5p kh\u00e1c nhau th\u1ebf n\u00e0o? C\u00e1ch nh\u1eadn bi\u1ebft v\u00e0 l\u1ef1a ch\u1ecdn \u0111\u00fang trong th\u1ef1c t\u1ebf Trong l\u0129nh v\u1ef1c d\u1ea7u b\u00f4i tr\u01a1n, kh\u00e1i ni\u1ec7m d\u1ea7u \u0111\u01a1n c\u1ea5p v\u00e0 d\u1ea7u \u0111a c\u1ea5p xu\u1ea5t hi\u1ec7n r\u1ea5t th\u01b0\u1eddng xuy\u00ean, \u0111\u1eb7c bi\u1ec7t trong d\u1ea7u \u0111\u1ed9ng c\u01a1, d\u1ea7u th\u1ee7y l\u1ef1c v\u00e0 d\u1ea7u c\u00f4ng nghi\u1ec7p. Tuy [&#8230;]\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[173,171,170,172],"class_list":["post-9314","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-cach-nhan-biet-va-lua-chon-dau-don-cap-va-dau-da-cap","tag-dau-da-cap","tag-dau-don-cap","tag-dau-don-cap-va-dau-da-cap-khac-nhau-the-nao"],"_links":{"self":[{"href":"https:\/\/yenhung.com\/index.php?rest_route=\/wp\/v2\/posts\/9314","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yenhung.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yenhung.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yenhung.com\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/yenhung.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9314"}],"version-history":[{"count":1,"href":"https:\/\/yenhung.com\/index.php?rest_route=\/wp\/v2\/posts\/9314\/revisions"}],"predecessor-version":[{"id":9315,"href":"https:\/\/yenhung.com\/index.php?rest_route=\/wp\/v2\/posts\/9314\/revisions\/9315"}],"wp:attachment":[{"href":"https:\/\/yenhung.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9314"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yenhung.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9314"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yenhung.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9314"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}