I have been running Delo 400 xsp 5w-40 for a while and can't seem to locate any at this time. I have 6 quarts and wondering if it would hurt to mix 4 quarts of 15-40 xsp with the 5w-40. I'm in Montana ! Thanks
What are the viscosity limits for an oil with an 11W winter rating?Nothing wrong with mixing, but as critic pointed out, tough to gauge what the winter rating will be. Looking at pure average of numbers, your proposed mix would be around an 11w40. Based on each oil's specific property, that may not be the true number but it'll be a ballpark.
Non-existent. But for a 10w I believe it's -22*.What are the viscosity limits for an oil with an 11W winter rating?
-17 the last two winters !What kind of low temps do you see in the winter?
your proposed mix would be around an 11w40.
At operating temperature there won't be any change. But the viscosity will be thicker until reaching operating temp.I have been running Delo 400 xsp 5w-40 for a while and can't seem to locate any at this time. I have 6 quarts and wondering if it would hurt to mix 4 quarts of 15-40 xsp with the 5w-40. I'm in Montana ! Thanks
I don't know if what I'm thinking is a valid point but, 5W40 and 15W40 have different density at the same temperature. The oil with lower density, 5W40, will end up floating above the higher density 15W40 in the sump. You'll end up with 15W40 being pumped first since it is at the bottom. Simple physics I imagine. I could be wrong though if mixing two different densities would result in an average of both.I have been running Delo 400 xsp 5w-40 for a while and can't seem to locate any at this time. I have 6 quarts and wondering if it would hurt to mix 4 quarts of 15-40 xsp with the 5w-40. I'm in Montana ! Thanks
What?? No, they are miscible. This is wild imagination.I don't know if what I'm thinking is a valid point but, 5W40 and 15W40 have different density at the same temperature. The oil with lower density, 5W40, will end up floating above the higher density 15W40 in the sump. You'll end up with 15W40 being pumped first since it is at the bottom. Simple physics I imagine. I could be wrong though if mixing two different densities would result in an average of both.
Sometimes I'm too carried awayWhat?? No, they are miscible. This is wild imagination.
-17 the last two winters !
The oil will mix.I don't know if what I'm thinking is a valid point but, 5W40 and 15W40 have different density at the same temperature. The oil with lower density, 5W40, will end up floating above the higher density 15W40 in the sump. You'll end up with 15W40 being pumped first since it is at the bottom. Simple physics I imagine. I could be wrong though if mixing two different densities would result in an average of both.