Amsoil?
Yeah well, good luck with that.
I use Castrol (regular, not high mileage) in my personal car because it is adequate to get the job done. I don't ask crazy things of my oil like trying to protect the engine at WOT 20 seconds after startup on a 20 degree day or after the oil temp goes thru the roof. That is what Mobil 1 is for, idiots that don't know how to take care of an engine. As for Amsoil, sure, it is great. It is so great it is complete overkill and a waste of money unless you are exploring outer space or something, like SS RRR.
Your filter is just as important. Wix, Hastings, K&N are all good filters. Mobil One extended life is probably the best off the shelf filter you'll find. Internally, it's just about identical to the again way over priced RP filter. Stay far away from Fram, Champion, cheep Bosch, etc.
Change your oil & filter when the oil starts turning black on the dip.
DO NOT USE ADDITIVES. Oil makers spend time & money on their formulas. Don't go ruining the oil with an additive you really don't need.
What do I use? German Castrol and Cummins Fleetguard filters.
Last edited by Paul Bell; Sep 22, 2011 at 11:16 PM.
Anything with a current API rating will work but some are way overpriced and you could conceivably be better off with generic oil instead.
One of the mentioned racing oils was always known to suck hard on the street it was great for short fill race applications but on the street wore out FAST, the running joke was "shears out of grade pouring from the bottle" meaning the oil was sheared at the molecular level and got very thin fast in street use. I haven't kept up on their current performance so I am not naming names but use such things as motivation to search the Bobistheoilguy forum and find out what actually works in other cars like your's used similarly.
I use Castrol (regular, not high mileage) in my personal car because it is adequate to get the job done. I don't ask crazy things of my oil like trying to protect the engine at WOT 20 seconds after startup on a 20 degree day or after the oil temp goes thru the roof. That is what Mobil 1 is for, idiots that don't know how to take care of an engine. As for Amsoil, sure, it is great. It is so great it is complete overkill and a waste of money unless you are exploring outer space or something, like SS RRR.
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Most oils shear down and get thin with use while some like Amsoil actually oxidize and thicken.








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