Amsoil 10W30

 

To add another question.... I thought that the low viscosity number was the one that was most important for cold starts. If so, why not go with 0W30?

 

I switched to amsoil 10-w40 since going turbo.....
And the turbo spun bearings the other day.....thinking that cold weather + w40 could have been the cause.....not shure though

 

With our cold weather I was definaly afraid to go over the recomended 10w-30 in the summer I was investigating running 10-w40, or getting a nice oil cooler.

 

Dino oil w/valvoline maxlife additive during break-in, Amsoil 10-30 now.

I was a doubter about Amsoil but I do have to say that there is less "clatter" underhood and the S/C spins quieter at idle. Hundreds of HPDE miles and I have zero oil consumption.

 

Where are you guys buying Amsoil ?

 

choosing the weight of your oil has a lot to do with the climate that you live in. The first number is how the oil behaves when cold and the second number is how it behaves at operating temp. This is the reason that honda sometimes states in the owners manual that if you live where it never reaches below X degrees then you can run a 10w instead of 5w. A 10W will not flow as easily when cold if you live in the desert in winter vs. the beaches in winter. They suggest a 5w a lot of the time because it can cover more areas--better safe than sorry. A 5w will usually be fine in desert winters as well as beach winters (again, this is for stock cars).

Since you have a greddy/mitsu oil cooled turbo, you know i suggest a w40 or w50, depending on how hard you drive the car and how hot your oil gets. I ran a w50 without problems. ppl here in socal ask me all the time whether i suggest 5w or 10w though and i always tell them it won't matter much since it never gets very cold here.

 

I am probably putting to much into this but I am going to get some engineering references books and see if I can get the information I need.

I am sure I will come the same conclusions about this but I am one of those people that has to understand it before I move on.

 

10W40 Redline here and LOVE it. (Socal)

 

Online, unless you can find a local distributor. They have this horrible, amway-like approach to selling through mom and pop distributors but they will sell direct and for a few $$ you can become a distributor and buy at a discount.

Personally, I think this hurts their creditability but if you have a couple cars and do a few oil changes a year it's probably worth becoming a distributor - it's not that expensive. They do ship fast if you are buying direct. They have a distribution center in my state and I got it in a day. As far as price, it's more than Mobil 1 at Costco, but no more than Redline or any of the others.