One would think. The trouble with our cars however is that even naturally aspirated we need rather good oil. There should be no difference in the oil you use from a turbo car from an NA car.

You're still looking for the base materials to be extremely low. IE: Calcium. The lower the ppm (parts per million) the better, while additives like zinc, and some detergents will prove beneficial so long as there's not too much. Especially if the car is turbo, which would lead to a fair amount of foaming. I'm trying to find some VR1 oil that was mentioned, but so far my searching has returned nill.

Found VR1 at Autozone and O'Rielly's in 20w50 and straight 50w. Wanted 10w30. It is not a synthetic oil.
Barry

My local ADVANCE AUTO only carries it in 20w-50 as well.

I don't understand. Aren't synthetic's generally more resistant to shear and coking? And isn't this a concern with the extreme rpm and heat of turbos?

The benefit of synthetic over conventional is the base they use. On the previous pages compare what is known as synthetic to good grades of conventional such as VR1. You could have a "good" synthetic with worse qualities for our engines than a top rated conventional. Drawing generalities across the board will cause trouble for people.

If you however compare VR1 to an oil like royal purple would you see a difference, I don't know. I don't know the UOA or the VOA's of the two.

Advance carries 20w-50 (but they never seem to be in stock) and 50... I ended up doing royal purple 10w-30 (though I would really like to run 20w-50 when it comes around) for the time being.

I've also noticed a price difference between the two. About a full dollar or more just at advance....

ZR1 Synthetic stats: http://www.valvoline.com/pdf/vr1_synthetic.pdf
ZR1 Conventional Stats: http://www.valvoline.com/pdf/vr1_racing.pdf
ZR1 Racing (non-street legal): http://www.valvoline.com/pdf/specialty_racing.pdf

Whys one not street legal?

According to mazpower; it deals with the anti-wear package and how much ZDDP is in the oil. Too much and it will clog cats.

Valvoline
Conventional: http://www.valvoline.com/pdf/premium_conventional.pdf
(sulphated ash:0.8)

Conventional - Next Gen: http://www.valvoline.com/pdf/nextgen_conventional.pdf
(sulphated ash: 0.8)

MaxLife: http://www.valvoline.com/pdf/maxlife.pdf
(sulphated ash: 0.93)

MaxLife Synthetic: http://www.valvoline.com/pdf/maxlife_full_synthetic.pdf
(sulphated ash: 0.93)

MaxLife NextGen: http://www.valvoline.com/pdf/nextgen_maxlife.pdf
(sulphated ash: 0.93)

Durablend Synthetic: http://www.valvoline.com/pdf/durablend.pdf
(sulphated ash: 0.99)

Synpower: http://www.valvoline.com/pdf/synpower.pdf
(sulphated ash: 0.93)

Mobile 1
Extended performance: http://www.mobil.com/USA-English/Lub...rformance.aspx
(sulphated ash: 0.8)

Advanced Fuel Economy: http://www.mobil.com/USA-English/Lub...l_Economy.aspx
(sulphated ash: 0.8)

Mobil 1 0w-40: http://www.mobil.com/USA-English/Lub...l_1_0W-40.aspx
(sulphated ash: 1.3)

Mobil 1 5w-20: http://www.mobil.com/USA-English/Lub...l_1_5W-20.aspx
(sulphated ash: .85)

Mobil 1 5w-30: http://www.mobil.com/USA-English/Lub...il1_5W-30.aspx
(sulphated ash: .8)

Mobile 1 10w-30: http://www.mobil.com/USA-English/Lub..._1_10W-30.aspx
(sulphated ash: .8)

Mobile 1 15w-50: http://www.mobil.com/USA-English/Lub...l1_15W-50.aspx
(sulphated ash: 1.21)

More to come.

Royal Purple... can't find anything from their site.
HPS: http://www.bobistheoilguy.com/forums...49#Post2578549

Are there any specific oils people would like more information on?