Next oil change is coming up soon. Jeep Cherokee - 4.0 engine - nearly 200,000 miles. I plan on making my own synthetic blend with 2 quarts of synthetic and 4 quarts of other.
Fist, which would you use - Chevron Supreme 10w40 or Delo 15w40? Cold weather is no longer much of a concern.
Second, for the synthetic, which should I use? Havoline 10w40 or Mobile 1 5w40? The Havoline would obviously be safter to mix with the other Chevron products, but the Mobile 1 is a better oil...
Fist, which would you use - Chevron Supreme 10w40 or Delo 15w40? Cold weather is no longer much of a concern.
Second, for the synthetic, which should I use? Havoline 10w40 or Mobile 1 5w40? The Havoline would obviously be safter to mix with the other Chevron products, but the Mobile 1 is a better oil...