Originally Posted By: SLCraig
Bullocks.
My next fill is going to be another frankenblend, because I have several jugs with only a bit of oil in each. They're all getting mixed next time around to use it up.
I use this for top-off, though I also add in whatever nonsolvent additives I have a little bot left of (read: just a little bit of MMO -- less than 40z in an overfilled 5qt jug). Now that I've more or less stopped the oil burning in both vehicles and have an overfilled top-off jug, after the oil change I'm doing later today on my Corolla, I'll be starting a second jug. That jug won't see any additives, though, so it will be a frankenblend worthy of an OCI. The first 1/2qt will be 75% T6 5w40 and 25% Mobil 1 0w20. By the time it's full it'll probably be 3qt NextGen 5w30 (remnants of 2 OCIs on my wife's Civic) and 1qt of the T6/Mobil 1 blend. The civic will probably get that blend since A) it'll have been running NextGen for 2 OCIs (and Valvoline for 3) by that point, where the Corolla has never seen Valvoline as long as I've had it, and B) It'll be time to transition it to a T6/Mobil 1 blend for an OCI or two by then, and weak the Corolla off that same blend since it'll have had it for 2 OCIs by then and already be as clean as it's gonna get.
After the clean-up OCIs on both engines, the Civic is going back on NextGen and I plan to put the Corolla on RP, keeping remnants of both in separate jugs. No more mixing once they're both clean, and once the top-off jug is empty, no more topping off with anything but what's in the sump.