I'm seeing UOAs with massive fuel dilution and still very acceptable wear metals. 20 and 30 grades turning into 16 grades where the manual calls for 20 or 30 grade, not 0W16.
Other people combating the dilution by using 40 grade oil in car that specs 0W20. No issues.
I have to part my MX-3 out and put the 2.5L 200HP engine into a better condition mx-3 (that I am still on the hunt for). The one that I will eventually find will have a 1.8L V6 130'ish HP engine. It specs 10W30. My thought is (before swapping to the 2.5L engine) to run 50 grade on it because 30 and 40 are widely tried and tested on this engine. And then some 20 grade. And then some 0W16. I'd probably drain the oil, then run desired weight, then drain that and refill after 1000kms or something silly. Just to normalize the viscosity if that makes sense. Would log fuel consumption and note the feel of the engine during tests. Could and should UOA too, to see if there's actually a discernible difference.
Also, I have such a silly oil stash right now, some of which is 10L of 20W50 and 5L of 5W20 so it's a good way to lessen the load in the name of [censored] science.
Other people combating the dilution by using 40 grade oil in car that specs 0W20. No issues.
I have to part my MX-3 out and put the 2.5L 200HP engine into a better condition mx-3 (that I am still on the hunt for). The one that I will eventually find will have a 1.8L V6 130'ish HP engine. It specs 10W30. My thought is (before swapping to the 2.5L engine) to run 50 grade on it because 30 and 40 are widely tried and tested on this engine. And then some 20 grade. And then some 0W16. I'd probably drain the oil, then run desired weight, then drain that and refill after 1000kms or something silly. Just to normalize the viscosity if that makes sense. Would log fuel consumption and note the feel of the engine during tests. Could and should UOA too, to see if there's actually a discernible difference.
Also, I have such a silly oil stash right now, some of which is 10L of 20W50 and 5L of 5W20 so it's a good way to lessen the load in the name of [censored] science.