If I add the quarts I would extrapolate the time to run it. I.E., if you start with 4 quart capacity and are changing it at 8k miles (2k mi per qt)… you drain & replace 2 full quarts- I would extend the OCI to 12k miles. If you ran 6 quarts 6k miles (1k per qt), I’d extend to 8k miles after replacing 2 quarts. But that’s me.I think I'd just buy a couple more quarts and use them on the next oil change.
You don't want to waste them but running them for 1,000 miles is wasting them.
Yes, of course.Ok...how about mixing the Dino with 100% FULL synthetic to achieve a "blend" composition? Is that safe to do?
Please tell me you know what an engine flush is and you didn't make the correlation you just did. If you did, you'd look like a real clown on a oil board and these guys going to have a fun time kicking your Richard in.
A forgetful mechanic at a dealership I once worked at forgot to put the oil drain plug in and ran through 4 quarts of oil. The owner was so incensed at the waste of oil he made the mechanic pay for it. According to new wave logic he was really doing an "engine oil flush" and they should have charged extra for it.Please tell me you know what an engine flush is and you didn't make the correlation you just did. If you did, you'd look like a real clown on a oil board and these guys going to have a fun time kicking your Richard in.
The oil companies use all the same[similar] additive packages . There are only a hand full of additive package formulators on Earth. Look at the posted uoas and voas.My only suggestion is that you use oil from the same brand on any given change. Different brands use different additives. They're all compatible but to be completely safe I'd only use oils of the same brand on any particular change.
Exactly. And you would have to do multiple fills with pure Nitrogen to get all that supposed "bad air" out.The Earth atmosphere is what % nitrogen?
Like your atf analogy, yes put the 2 qts in and extend your oci.I have about 2 qt of Super-Tech Dino oil that I'm not inclined to waste. My car calls for 4.3 qt each oil change. Would it be safe to drain out 2 qt of old oil, then replace with new and extended the complete drain and fill interval another ~1,000 miles? I'm just extrapolating logic from a transmission drain and fill, where half the old fluid still remains in the torque converter. I think the oil filter can make it until the complete drain.