mixing oils?

Patman

Staff member
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21,989
Location
Oakville, Ontario
Yes, that 5w300 oil is too thick! [Smile] Seriously, you'll be fine. Why mix though? If you want a slightly thicker oil, go with one of the high mileage 5w30s out there, they are all close to 40wt oils.
 
Messages
688
Location
Morgantown, WV
Mix -n- match all you want, as long as the oils you use are acceptable for that engine. I had a beater truck for a few years that I gave it all my leftovers. It never seemed to care. Cheers, 3MP
 
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Location
USA
hey patman I've been putting pennzoil high mileage 5w30 in a 96 pontiac sunfire 2.2 liter engine with 92k miles on it. It's burning the pennzoil high mileage 5w30 at a quart every 1200 miles. the engine calls for 5w30. Since the weight is almost a 40wt, any problems going to 10w40 high mileage even? I want to go thicker since summer is coming.
 

Patman

Staff member
Messages
21,989
Location
Oakville, Ontario
quote:
Originally posted by Cutehumor: hey patman I've been putting pennzoil high mileage 5w30 in a 96 pontiac sunfire 2.2 liter engine with 92k miles on it. It's burning the pennzoil high mileage 5w30 at a quart every 1200 miles. the engine calls for 5w30. Since the weight is almost a 40wt, any problems going to 10w40 high mileage even? I want to go thicker since summer is coming.
Why do you want to go even thicker? Just because of the oil burning? A thicker oil might slow down the rate of consumption, but it also might increase engine wear also, as I don't believe your engine needs a 40wt oil. But without seeing oil analysis results, neither of us really knows for sure.
 
Messages
436
Location
PHX
quote:
Yes, that 5w300 oil is too thick!
Whoa [Eek!] .....and I thought we were headed the other direction....... Don't worry, 1MPG is fine......screw CAFE!! Typos.... [Duh!]
 
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