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

[jgreening]

If you are going to quote the article, it is best to quote the relevant portion. Fortunately, its the part that came right after the part you copied. Since you might not have seen it, I will post it here for you:

Of course, the next obvious question is, "If synthetics have those special additives, why might they cause leaks in an older engine? Why don't they correct the problem?"

Believe it or not, I've got an answer for that too. The "problem" is that there are also other additives that give a synthetic oil its detergency properties. In other words, there's other stuff in high quality synthetic oil which tends to clean out the sludge and deposits left behind by petroleum oils. Once these deposits are gone, the gaps around seals and gaskets become exposed and the oil might begin to leak in these areas.

As for your argument that this was written by an Amsoil dealer so that means the information is suspect, lets think about that. 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?