Quote:
Originally Posted by SPCBA
i use amsoil z rod for my cammed v8. i have tried a few different oils. mobil 1 is crap and so are most mainstream brands now. they took out the good stuff of the oil that reduces wear to protect your cats because big brother frowns on things that are good for the car and bad for cats. i dont know how its overhyped because so very few people use it comparitively to mobil.
oils high in zinc and phosphorous is what you want if you want your car for a long time. amsoil z rod has done me well as a daily driver and on a road course. I am amused by folks who are not willing to spend a tad more on oil for a 40 k car. Amsoil is not hard to get its just not at autozone. they have dealers around the country and also sell via internet and snail mail. there are 15 amsoil dealers located within 20 miles of me.
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It's a good oil, but studies you see out there put it at the #1 spot in almost everything and those studies that do that are conducted usually by..... amsoil themselves
They had a study long ago about the sheer stability of the oil, but in a particular machine of mine that was hard on oil it sheered during the UOA. Mobil 1 sheered as well. The only oil that did not was Valvoline VR1. When you do your own comparison and put yourself at the top of the list in sheer stability then your oil sheers, then i consider it over hyped. So yes it's a good oil, but there are oils just as good that as cheaper and more easily accessible.
Here is an independent wear study.
http://speedtalk.com/forum/viewtopic.php?t=30483
Amsoil is in the to four, but Mobil 1 is above it:
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********** OUTSTANDING PROTECTION ************
1. 5W30 Pennzoil Ultra, API SM = 115,612 psi
I have not been able to find this oil with the latest API SN certification. The bottle says, “No leading synthetic oil provides better wear protection”. For once, a product’s hype turns out to be true.
zinc = 806 ppm
phos = 812 ppm
moly = 66 ppm
2. 10W30 Lucas Racing Only = 106,505 psi
zinc = 2642 ppm
phos = 3489 ppm
moly = 1764 ppm
NOTE: This oil is suitable for short term racing use only, and is not suitable for street use.
3. 5W30 Mobil 1, API SN = 105,875 psi
zinc = 801 ppm
phos = 842 ppm
moly = 112 ppm
4. 0W30 Amsoil Signature Series 25,000 miles, API SN = 105,008 psi
zinc = 824 ppm
phos = 960 ppm
moly = 161 ppm
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Amsoil Z-Rod, however drops toward the middle of the list in this study:
Quote:
17. 5W20 Castrol GTX conventional, API SN = 95,543 psi
zinc = TBD
phos = TBD
moly = TBD
NOTE: Oil numbers 16 and 17 were tested weeks apart, but due to the similarities in their wear scar sizes, their averages ended up the same.
18. 5W30 Castrol GTX conventional, API SN = 95,392 psi
zinc = TBD
phos = TBD
moly = TBD
19. 10W30 Amsoil Z-Rod Oil = 95,360 psi
zinc = 1431 ppm
phos = 1441 ppm
moly = 52 ppm
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