06-07-2008, 03:14 AM
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#2 |
 Toyota Racing Development Join Date: Apr 2007
Posts: 5,038
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I live in Denver, similar temp variations. I usually run 10W-30 up until early summer and then switch to 10W-40. Depends on how hard you're going to be running the car and how well your cooling system is doing it's job.
I used to run Castrol GTX High Mileage, but now that most of the engine's rebuilt and all of my seals are new I run a synthetic blend. |
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