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Old 06-03-2011, 07:03 PM   #1 (permalink)
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Default Mixing brands of oil and weights

Is it a big deal to mix brands of oil and weights?

I ask because I have quite a few partial quarts of oil that I would like to get rid of. It is all Full Synthetic, and a mix of 75% Mobil 1 and 25% Valvoline. It is all 5W-30 except for 1.5 quarts of 5W-0. I have 2 oil changes to do in the Subaru and the Honda I have enough quarts to do both oil changes, but if the 1.5 qts of 0 says it offers the same protection as 5-30, can I use that up?

Odd situation but I'm getting sick of all these partial quarts of oil. With every vehicle using somewhere between 4 and 5 quarts of oil, I'm always left with a little bit and it's just pissing me off this evening.

Thanks.

PS: If it matters, I have almost 90,000 miles on the car. 2.5 auto.
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Old 06-03-2011, 07:48 PM   #2 (permalink)
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1.5 quarts of what? 5w0 does not exist. 5w20, 0w20? And yes, you can make a blend with little effect.
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Old 06-06-2011, 06:30 PM   #3 (permalink)
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No problem mixing 0w-30 and 5w-30 from different manufacturers. One reason for having API Specs is that the products are compatible. Fleets that select lowest bidder lube contracts change oil brands regularly.

TS
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