PAH Donating Members 361 Member For: 16y 4m 25d Gender: Male Posted 29/12/09 01:51 AM Share Posted 29/12/09 01:51 AM Not all synthetic engine oils are Group 4 synthetic oils. Some are Group 3 oils. Group 3 oils are mineral oils that have been put through extra refining steps.Viscosity improving additives are added to mineral based oils to produce a multi grade oil. When the viscosity improving additives are depleted through use, the engine oil no long resists thinning when the engine is hot. This leads to engine wear. How can you tell if an oil has heaps of viscosity improving additives? It has a wide multi grade range. For example, 0w 50.Here’s a quote from an interesting web site:Group IV (4) base oil (synthetics) are chemically made from uniform molecules with no paraffin and don't need Viscosity Additives . . . . In recent years Group III (3) based oils have been labelled "synthetic" through a legal loophole. These are petroleum based Group II (2) oils that have had the sulphur refined out making them more pure and longer lasting. Group III (3) "synthetic" motor oils must employ Viscosity Additives being petroleum based . . . Only the Group IV (4) PAO base synthetics have the saturated chemistry to resist degrading when exposed to the by products of combustion and heat, plus typically employ no Viscosity Imrpoving additives making them very thermally stable for longer periods. For this reason the Group IV (4) synthetics maintain peak mileage and power throughout their service lifehttp://www.upmpg.com/tech_articles/m...ity/index.htmlPAH Link to comment https://www.fordxr6turbo.com/forum/topic/64679-the-best-oil-group-4-synthetic/ Share on other sites More sharing options...
PHANTMXR6 It's not a MKI! Member 1,742 Member For: 16y 11m 25d Gender: Male Location: Earth Posted 29/12/09 03:08 AM Share Posted 29/12/09 03:08 AM Dud link PAH. Link to comment https://www.fordxr6turbo.com/forum/topic/64679-the-best-oil-group-4-synthetic/#findComment-966649 Share on other sites More sharing options...
PAH Donating Members 361 Member For: 16y 4m 25d Gender: Male Posted 29/12/09 03:35 AM Author Share Posted 29/12/09 03:35 AM (edited) On 29/12/2009 at 3:08 AM, PHANTMXR6 said: Dud link PAH.Sorry about that. Try this one.Motor Oil Viscosity Grades Explained in Layman's Terms Edited 29/12/09 03:36 AM by PAH Link to comment https://www.fordxr6turbo.com/forum/topic/64679-the-best-oil-group-4-synthetic/#findComment-966665 Share on other sites More sharing options...
aiboart Member 665 Member For: 20y 4m 29d Posted 29/12/09 11:24 AM Share Posted 29/12/09 11:24 AM (edited) On 29/12/2009 at 3:35 AM, PAH said: Sorry about that. Try this one.Motor Oil Viscosity Grades Explained in Layman's TermsIf you follow the link to the test articles at the bottom of the page there is a an intersting result.Link to the test results - See GTX in Four Balls Wear Test - 3rd from LeftGTX, which I understand is exceedingly cheap oil, scored second best in a field of 11 oils in the Four Balls wear test (Amisol and one other brand came equal first) Regards,aa Edited 29/12/09 11:27 AM by aiboart Link to comment https://www.fordxr6turbo.com/forum/topic/64679-the-best-oil-group-4-synthetic/#findComment-966760 Share on other sites More sharing options...
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