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This stuff all depends on the day, and the writers or researchers.
Granted there will always be bias when discussing something of this nature, unless you take the info from a wide range of input. This website has a forum where people are doing independent analysis, blot tests, shearing analysis, bearing analysis, etc... Way over the top as far as available information goes. Peruse those forums. Make your own judgment.
This question comes up frequently. Everyone has their own personal favorites, but there's no such thing as a one-size-fits-all oil, or a best oil "overall". Every engine is different. Every oil has its place. What works for one engine might not work for another.
1. What kind of vehicle you have
2. What your owner's manual says -- not just viscosity, but certifications (look for acronyms like API SM, ILSAC GF-4, etc.) and change intervals as well
3. Where you live
4. How you drive (easy? hard? fast? slow?)
5. What your daily drive is like (short trips? long trips? city? highway?)
6. Whether your car has any known problems
thats why i posted that oilbible page he states the same thing
mobile 1 is not cheap and the price well at least to me is not worth it ive used it be for then whent to royal purple all a round the car even my trans and rare end and i saw a better gas mileage and horse power gain and never lose oil or burns but i might go and try AMSOIL and try there AMSOIL chassis grease that they say with lab tests last longer and more weather proof and heat and so forth ill let you guys know how that gos
This question comes up frequently. Everyone has their own personal favorites, but there's no such thing as a one-size-fits-all oil, or a best oil "overall". Every engine is different. Every oil has its place. What works for one engine might not work for another.
1. What kind of vehicle you have
2. What your owner's manual says -- not just viscosity, but certifications (look for acronyms like API SM, ILSAC GF-4, etc.) and change intervals as well
3. Where you live
4. How you drive (easy? hard? fast? slow?)
5. What your daily drive is like (short trips? long trips? city? highway?)
6. Whether your car has any known problems
That website is awesome. If you TRULY want to determine the best oil for your car, your mods, your driving, etc., you could do worse than spend time reading all the white papers that website links to; read the articles, read the forums, and then integrate all of that data and make your choice.
However the good news is that if you use any oil that meets the car manufacturers' specs you're probably gonna be OK at least on a stock/bolt-ons motor.