AMSOIL vs Royal Purple

[SilverGlow]

Use the synthetic that's on sale. Either one will allow your engine to last through 300,000+ miles. In addition, it is a waste of $$ to not extend your oil changes if you go with synthetic. However if your car is still under warranty, I would not go more then what the manual states. After the car is out of warranty, then go with synthetic and the oil should be good for at least 7,000 to 10,000 miles, depending on how you drive, where you drive, and the brand of oil.

At the end of the day, you can put the "worse" synthetic oil in your car, and it will still pull strong at 300,000+ miles...this is something no one really wants to admit because for most, oil is "religion" and their preferences are more found in very subjective reasons, devoid of scientific back up. ;-)

Before you change out a particular brand, do a UOA and use that as a base line when trying other oils, or you could just get what's on sale and call it a day.

[Split]

i've always heard that AMSoil is the best because its a group(grade?) 4-5 blend which is the best you can get apparently. That said, the only reason I bother running it is because my friend gets it for wholesale price at the dealership he works for so its no more expensive for me than mobil1/royal-purple/etc.

[SilverGlow]

Originally Posted by Split

i've always heard that AMSoil is the best because its a group(grade?) 4-5 blend which is the best you can get apparently. That said, the only reason I bother running it is because my friend gets it for wholesale price at the dealership he works for so its no more expensive for me than mobil1/royal-purple/etc.

In your case, I'd stay with AMSoil if you can get it at a great price.

[1stToyota]

Originally Posted by SilverGlow

Use the synthetic that's on sale.

Okay.

I can get Amsoil XL for just over $5 and HP for around $6.50 with my preferred customer discount, when I buy it by the case.

And that's a better price than what I'd have to pay at the parts store that I have an account with:

Val SynPower $5.49
LubroMoly $8.80
Castrol Syntec $7.49
Lucas $7.49
Mobil1 $7.99
Mobil1 XP $8.99
PP $6.89
RP $8.49