M1 5W30, 6K Miles, 03 GM 4.2L

[SnPb]

This is the Blackstone UOA for my 2003 Chevrolet Trailblazer with the 4.2L I-6 engine. The oil used was M1 5W-30 and it was changed at about 6,000 miles. The Oil Filter was a Napa Gold 1522 and the Air Filter was a Fram CA9345. Blackstone commented on the Cu being a little high. This vehicle only has the basic GM Oil Life Monitor so I can't tell you what percent of life was left, but I didn't reset it when I changed the oil and it recently went off at about 93,000 miles; meaning that the OLM recommended leaving the oil in for 9,000 miles. I drive about 20 miles each way to work in a mix of city and highway driving and the temperature here in southern Arizona rarely drops below freezing. The previous fill was PP 5W-30 and the one before that M1 5W-30.

Cheers,
Jeff

 

[addyguy]

Not bad results at all. Nice and consistent between runs.

Engine is easy on oil - all runs held viscosity and flashpoint very, very well.

 

[1999nick]

Isn't your OLM calibrated for regular dino and not synthetic? If it says dino was good for about 9000 miles, how much longer could you have left the synthetic in?

 

[SnPb]

Yes, the OLM is probably set up for a conventional. I would be comfortable extending the change interval of the oils that I have been using out to 7,000 or 8,000 miles, but I don't think that I would go so far as 9,000 miles. It wasn't too long ago that I was a member of the 3,000 mile club.