Application is '06 Saab 9.3 SS/2.0T (turbocharged)- for which i'm contemplating tailor making my own blends of weight/brands of oil depending on season/operating conditions/etc. If nothing else, consider it a thought exercise/conjecture lol. so i'm curious...
When you blend 2 (or more) weights of oil, does it end up as the mean/average number? or does it just make a mixture, with the two weights remaining distinct?
For example-
1 part 0w-20 + 1 part 10w-40= 2 parts 5w-30? Or does it equal 2 parts of a 0w20/10w40 mixture?
If it is the latter, it would be UNdesirable, because (in summer for instance) in the hot turbo engine the parts of 0w20 could brake and/or fail early, correct?
When you blend 2 (or more) weights of oil, does it end up as the mean/average number? or does it just make a mixture, with the two weights remaining distinct?
For example-
1 part 0w-20 + 1 part 10w-40= 2 parts 5w-30? Or does it equal 2 parts of a 0w20/10w40 mixture?
If it is the latter, it would be UNdesirable, because (in summer for instance) in the hot turbo engine the parts of 0w20 could brake and/or fail early, correct?
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