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soslow · 10-12-2016

A few days ago I brought my 1990 ZR-1 in for an oil change and specified to the mechanic that I wanted Mobil 1 High Mileage oil. He replaced the 8.5 quarts and gave me a half quart to bring home. When I got home, I noticed that he put in 5w-30 weight oil instead of the 10W-30 that the car calls for. Is this a big deal? It is synthetic and has some 10W-30 from the last oil remaining that doesn't drain out. Any thoughts?
The car only has 11,000 miles on it.

10-12-2016	#1
soslow Join Date: Sep 2004 Location: SELDEN, NEW YORK Posts: 24	oil change question A few days ago I brought my 1990 ZR-1 in for an oil change and specified to the mechanic that I wanted Mobil 1 High Mileage oil. He replaced the 8.5 quarts and gave me a half quart to bring home. When I got home, I noticed that he put in 5w-30 weight oil instead of the 10W-30 that the car calls for. Is this a big deal? It is synthetic and has some 10W-30 from the last oil remaining that doesn't drain out. Any thoughts? The car only has 11,000 miles on it.