Valvoline SynPower 5w40 is perfectly fine for 10,000 change intervals. As long as it meats CI-4 or VW505.00 or ACEA B3, it's a perfectly ok oil.
On my car (1992 SLC VR6) on a 100 degree humid summer day, I see a max of 260 degree Farenheit on my oil temp display. I'm running Castol (non-synthetic) 20w-50w in the summer, but I switch to 5w-30w or any of the less expensive 5w-xx oils during the winter. I've been doing this for 5 years now, changing the oil & filter every 3000 miles, and so far, no problems.
I too have used the SynPower since 16,000 miles. The tested sample had 8100 miles on it and had very good readings. I also had the Total Base Number tested which is the additive package. It was 2.0 which is low. They suggested I go no longer than 8100 miles on this oil in my engine due to the additives being low.
I ran this fill from mid Fall through the winter until 4/14/03. I filled up with about .25 of a qt 3000 miles into the interval. Analysis done by Blackstone Laboratories. Total miles on oil: 4,886 DAVID: Although we expect an engine’s break-in period to be past by about 10,000 miles, we suspect that the 5 ppm lead we found in this sample is from lingering wear-in. Upper-end wear (see aluminum, chrome, and iron) looks great. Lead should decrease in the next sample, as should silicon, which is leftover sealers used at the factory. Insolubles were good at 0.4%, showing your oil filtration system is getting the job done.
i pay 8 bux a liter for Castrol TWS MotorSport 10w60 oil...so, that's like 42 bux (after tax) for 5 liters, then next change i'll pay like like 29ish for 4 liters...since i have a half liter or more leftover from the last change... then like 6 bux for OEM filter, drain plug and seal... so...48 bux/35 bux per change for me, just for oil & filter...
Surveys on several VW forums have Castrol 20w50 a clear winner for quality, price and availability, but other good brands like Valvoline, BP, Shell etc get honourable mentions too.
If you run it HARD than a 20/50 oil is good. I run castrol non synthetic, but I'm thinking of switching to Royal Purple. Still want to get more opinions before I do the change over but I heard good things about that brand.
you can buy Valvoline Synpower at any NAPA Auto Parts Store.
Just go out and buy Valvoline SynPower 5W40...
I have decided to use Castrol GTX 5W-30.
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