Amsoil for a built motor....too many choices
#1
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Almost done with break-in miles on my miata and want to run Amsoil this time around. In the past I used T6, Mobil 15w50, royal purple. Im torn between the Amsoil Signature series 5w50 and the Dominator Race oil 15w50. I dont plan on tracking the car, but it will be driven in a spirited fashon on the street. I like the 50 weight stuff for increased warm oil pressure it makes me feel all warm and fuzzy inside. The Signature series seems like the choice here, but the Race oil probably has a better additive package and I plan on changing oil every 3000 miles anyways. What say you guys?
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Race oil won't typically have additives to buffer acid formation and some other things generally desired in a street engine. It is designed to run a handful of sessions between changes. Bear that in mind.
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Where do you live, and what oil temperatures do you see? Hard to get oil really hot on the street.
Might be better off with a much thinner oil. Spec Miata guys run 20 and 30wt at 300*
Even the 10w40 Amsoil https://www.amsoil.com/shop/by-produ...?code=AMOQT-EA has great pressure at 280* depending on your clearances and pump. All depends on sustained temps and if by built you mean tight or loose?
Race oils need a race maintenance schedule.
Might be better off with a much thinner oil. Spec Miata guys run 20 and 30wt at 300*
Even the 10w40 Amsoil https://www.amsoil.com/shop/by-produ...?code=AMOQT-EA has great pressure at 280* depending on your clearances and pump. All depends on sustained temps and if by built you mean tight or loose?
Race oils need a race maintenance schedule.
#5
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Where do you live, and what oil temperatures do you see? Hard to get oil really hot on the street.
Might be better off with a much thinner oil. Spec Miata guys run 20 and 30wt at 300*
Even the 10w40 Amsoil https://www.amsoil.com/shop/by-produ...?code=AMOQT-EA has great pressure at 280* depending on your clearances and pump. All depends on sustained temps and if by built you mean tight or loose?
Race oils need a race maintenance schedule.
Might be better off with a much thinner oil. Spec Miata guys run 20 and 30wt at 300*
Even the 10w40 Amsoil https://www.amsoil.com/shop/by-produ...?code=AMOQT-EA has great pressure at 280* depending on your clearances and pump. All depends on sustained temps and if by built you mean tight or loose?
Race oils need a race maintenance schedule.
#6
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From what I have heard, the Dominator oil has more zinc in it. Works great for older engines. A link I came across recently claims Amsoil Signature performed better than the Dominator. I have not had a chance to actually read through this, but it is something to look over.
https://540ratblog.wordpress.com/201...-test-ranking/
https://540ratblog.wordpress.com/201...-test-ranking/
#7
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From what I have heard, the Dominator oil has more zinc in it. Works great for older engines. A link I came across recently claims Amsoil Signature performed better than the Dominator. I have not had a chance to actually read through this, but it is something to look over.
https://540ratblog.wordpress.com/201...-test-ranking/
https://540ratblog.wordpress.com/201...-test-ranking/
#9
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+1 I run that in my WRX and ran it in the miata before I built the engine. Only reason Im not going back with it this time around is I read that recently they changed their additive package and its not as good as it once was. Ive been trying to find recent reports on its film strength, etc but cant find anything definitive.
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