Re: Amsoil vs Mobil ! and the rest of the synthetics
Spinner_bait Nut, yes it works well but Diesels are a different animal, for years amsoil only offered a para-synthetic(to keep the price down) because diesels, by their nature foul lubricating oil prodigiously. So you couldn't do the extended oil change routine to mitigate the higher cost of synthetic. They now offer 15w-40 full synthetic (same as marine), for higher bearing protection, but I haven't checked their oil change recommedations. There is no doubt that I far exceed Amsoils oil change recommedations but unless I incurr an event that would contaminate the oil I stick with my experience.<br /><br />As to converting to synthetic:<br /> Don't convert a high mileage engine as it may be sealed up with gums, varnishes, sludge, etc that may be keeping the engine from leaking. Synthetic will clean all that stuff out. Back in the days of cardbaord oil cans, Amsoil had to pack the oil in full metal cans to contain it.<br /> Don't convert a new enginge till it is broken in and not using any oil. An engine will not break in using synthetic<br /> For low to medium mileage engines in good shape, add a can of synthetic to your petroleum oil and run it for a thousand miles to clean out any stuff that has accumulated in your engine, then drain it all, hot, and fill'er up with synthetic.<br /> If you don't go with bypass filtration, at least use the highest quality oem filter (yes there is a difference) follow Amsoils recommended oil change intervals and DON"T try to use the oil change program I use.<br /><br />Bypass filtration removes particles something like 4 times smaller than than ANY oem cartdridge replacement.