I did 3 quarts Chevron 10w30 with 1/2 quart of Mobil 1 10w30 today in a Mazda 323.
Rate The Oil Mixing Scenarios (mix friendly posts only, please)
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Talking about mixing oils is what keeps us mixers out of psycoanalysis and psycotherapy!
BTW, thanks for bringing the thread back up top.
Probably something similar to my mixing 2 quarts Delo and 4 quarts Chevron Supreme 10W30. Everything seesm to be fine.
I'm wondering if, for winter I can just use 5 quarts Chevron 10W30 and 1 quarts Chevron synthetic 10W30 to sort of improve cold starts.
I'm also wondering when I will get a life....
my fords like this mixture:
4qts redline 10w30
1qt synergyn 3w30
1.5qts delvac 1 5w40
4qts redline 10w30
1qt synergyn 3w30
1.5qts delvac 1 5w40
To me, the Supreme 10w30 + Chevron 10w30 Grp III Syn mix makes sense on paper, as the Grp III will lower the pour point of the mix for cold weather starts.
This mix (based on my "home brew" theories) will have higher viscosity base oils & better shear than a 5w30.
Generally, a 5w30 starts out with lower base oils than a 10w30 & relies on VII to meet the SAE 30 viscosity grade rating at 100C.
This mix (based on my "home brew" theories) will have higher viscosity base oils & better shear than a 5w30.
Generally, a 5w30 starts out with lower base oils than a 10w30 & relies on VII to meet the SAE 30 viscosity grade rating at 100C.
Another note: Whan I mixed a bunch of random oils with synths, I expected to get good cold-cranking, maybe CC of a multigrade, only raise it.
As for my wisecracks, that's a way I've always used get attention, but also it keeps conversation going.
As for my wisecracks, that's a way I've always used get attention, but also it keeps conversation going.
2 qrts of Castrol GTX 30 weight and 1 qrt of Chevron 20W50 in my 64 Ghia...
I switched too early to synthetic and the Mobil 1 15W-50 was seeping past the rings causing smoke. I went back to conventional oil (Dino).
I switched too early to synthetic and the Mobil 1 15W-50 was seeping past the rings causing smoke. I went back to conventional oil (Dino).
A wild guess is that you maybe ended up with a 20w40.
My father-in-law always has his oil changed at the Chevy dealership. I noticed a couple quarts of Quaker State oil in his garage that he maybe uses to top up between oil changes. Bet he has no idea what brand the dealership puts in. Probably a lot of folks doing the same thing. So mixing is going on all the time, albeit nothing radical like Redline/Havoline, but nonetheless we aren't hearing about a lot of engine failures and I don't see many foggers on the road (and they don't regulate them off the road here in the Motor City). Mixing must be pretty innocuous, except for what I would assume are rare circumstances such as Audi just described above.
With dino oils, mix away. They all have pretty much the same chemistry anyway. That's the only choice on the list I'm comfortable with. If you mix dino and syn, just don't expect a CC bump is what I am saying.
MarkC - If you are looking to improve coldstarts, why not just switch to 5w30 ChevSupreme from 10w30 ?
OK here is a wild brew I thought up in my spare time (just for fun
). Anyone want to try it?
1 qt Valvoline All Climate 20w50
1 qt Shell Rotella 15w40
1 qt NAPA straight 40
1 qt Mobil 10w30
1 qt Redline 5w20
This mixes HDMO with PCMO; ester, PAO, and dino; multigrade with straight weight, and has a wide variety of weights. Notice I avoided all the wider spreads. Who will run this mix? Do a UOA on it too.
1 qt Valvoline All Climate 20w50
1 qt Shell Rotella 15w40
1 qt NAPA straight 40
1 qt Mobil 10w30
1 qt Redline 5w20
This mixes HDMO with PCMO; ester, PAO, and dino; multigrade with straight weight, and has a wide variety of weights. Notice I avoided all the wider spreads. Who will run this mix? Do a UOA on it too.
Whoa...Master!!
Oops, I meant Mobil 1. In my rush I edited the 1 out.
1 qt Valvoline All Climate 20w50
1 qt Shell Rotella 15w40
1 qt NAPA straight 40
1 qt Mobil One 10w30
1 qt Redline 5w20
Gotta have a good slug of PAO in their!
1 qt Valvoline All Climate 20w50
1 qt Shell Rotella 15w40
1 qt NAPA straight 40
1 qt Mobil One 10w30
1 qt Redline 5w20
Gotta have a good slug of PAO in their!
I am afraid I am not deserving of the honor. Just changed wife's Aerostar oil and filled with 5 qts free Valvoline Synpower--no adds, no mix.quote:
Originally posted by Pat in Speedway:
Whoa...Master!!Is that Mobil 1 or DC?
Not to say I won't do some mixing. Just seemed a shame to adulterate the nice Synpower.
Maybe even will try my wild brew in my pickup someday (if someone else dosen't try it first.
Wow...what a combo! That gives us something like 18w36?? If winter wasn't on the horizon, I might play guinea pig on this one! Of course I could always try it on my mother-in-law's Econoline...she won't know the difference. Besides, I don't charge her!
I am interested by Audi Junkie's comments on not lowering PP & CC by mixing syn and dino, but actually raising them. Explain please?
I don't know, but I had two baby food jars in my freezer around zero F for a couple days. One had 10w30 dino; the other a 50/50 mix of 10w30 dino and 10w30 Redline. The Redline/dino mix definitely poured better at that temp. Don't know what it would do at say -40F.
All I am saying is not to COUNT on a mix lowering CC. My experience was bad. No crank and barely able to downhill pushstart at -5f. I had to bang the clutch out to spin the engine. Then I promptly changed to a full synth, no problems afterwards.
Audi will have to explain this. The only possibilities I can come up with is that the pour point depressant or VI improvers in the dino add package were affected by the combination of additives.
The Mobil 1 site repeatedly states that M1 is fully compatible with dino oils. In general, the better cold temp viscosity & flow properties of a full synthetic should help a mix in cold temps.
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