Oil Type?, what type is best Options

[Praying_Mantis]

i haven't changed my oil since i bought my car a while ago so i think i'd better give it a service. Just wondering what the best type to use is ie. synthetic, semi synthetic or a good quality non synthetic? cheers

[Bigmeanbulldog55]

Amsoil makes synthetic oil. Therefore, if they are going to "spin" the article, they are surely going to do it in favor of synthetics. Here they admit that switching might cause oil leaks. Why would that admission be biased?

Maybe they are trying the old reverse psychology thing. I never really thought it was debatable if synthetics could help the leaks leak. They don't cause them themselves necessarily, but they will open up holes that were plugged by petroleum oils. All that needs to be proven is that synthetics have a detergent or cleaning additive in them that can break up slug left by other oils. If that can be proved, there is no contest here.