I have a 1998 GMC Jimmy with 4.3L V6 engine, 119k miles. I just completed an auto-rx rinse phase, changed the oil and started another auto-rx treatment due to the fact that I have decided to keep this vehicle rather than sell it. I purchased it when it had 114k miles, and it was a one-owner vehicle.
My driving habits will be 6 miles to work (normally three, but this has changed until December 2010 while a bridge is being renovated), home for lunch, back to work, then home. Occassional driving around town on the weekends. In six months, I should be very well under 4k miles. Debating between using SuperTech 5w/30 sythetic with 6 month OCI's or Pennzoil Platinum 5w/30 and one year OCI's. With short distance, sub-zero temp driving, will these oils hold up o.k.?
My driving habits will be 6 miles to work (normally three, but this has changed until December 2010 while a bridge is being renovated), home for lunch, back to work, then home. Occassional driving around town on the weekends. In six months, I should be very well under 4k miles. Debating between using SuperTech 5w/30 sythetic with 6 month OCI's or Pennzoil Platinum 5w/30 and one year OCI's. With short distance, sub-zero temp driving, will these oils hold up o.k.?