So....
At 10,000 miles my A4 had it's first oil change and I used Redline 5w-40 because I assumed it's Noack volatility of 6% would help with intake valve deposits that these DI engines are known to have.
One thing I don't like about this oil is how long it takes to achieve operating temperature in my car. On a cold fall morning (45F) I'm 10 minutes into the drive before the oil touches 140F and it reaches 190F 22 minutes in just as I'm pulling into the parking garage.
I just ordered Redline 5w-30--I plan on 5,000 mile OCI and figured the lower 40C viscosity would be better for winter use.
In all of this I completely forgot to figure in TEOST testing results and how that might hurt intake deposit formation. Redline has poor TEOST results even though Noack volatility is very good. I really would like to avoid having the intake valves walnut blasted every 40,000 miles. I am actually considering not using the very expensive oil I just ordered for fear of deposit accumulation. Does anyone here have experience with Audi/VW engines and oil choices that could possibly reduce intake valve deposits?
I do feel stupid in trying to out-think the manufacturer. Perhaps I should just use Castrol Professional as they recommend? Audi allows for any oil meeting 502.00 or 504.00 spec.
At 10,000 miles my A4 had it's first oil change and I used Redline 5w-40 because I assumed it's Noack volatility of 6% would help with intake valve deposits that these DI engines are known to have.
One thing I don't like about this oil is how long it takes to achieve operating temperature in my car. On a cold fall morning (45F) I'm 10 minutes into the drive before the oil touches 140F and it reaches 190F 22 minutes in just as I'm pulling into the parking garage.
I just ordered Redline 5w-30--I plan on 5,000 mile OCI and figured the lower 40C viscosity would be better for winter use.
In all of this I completely forgot to figure in TEOST testing results and how that might hurt intake deposit formation. Redline has poor TEOST results even though Noack volatility is very good. I really would like to avoid having the intake valves walnut blasted every 40,000 miles. I am actually considering not using the very expensive oil I just ordered for fear of deposit accumulation. Does anyone here have experience with Audi/VW engines and oil choices that could possibly reduce intake valve deposits?
I do feel stupid in trying to out-think the manufacturer. Perhaps I should just use Castrol Professional as they recommend? Audi allows for any oil meeting 502.00 or 504.00 spec.