Coyote Chris
Site Supporter
In the last century, before clutch eating additives, I used just about any automotive oil in my 1983 Goldwing and toured with it 18 years.I know what I'm about to say is going to rankle many - I run Walmart Super Tech 15-40 in everything I own, including the NT, except in the summer when the daytime temperature is consistently over 70 I run Super Tech 20-50 in the air cooled Yammy. I always change oil @ 3mos or 1000 to 1500 miles, whichever comes 1st. I have never had an oil related issue ever.
As long as the Supertech doesnt have the special slick energy saving additives, even if it doesnt meet JASO MA standards, you are probably doing little/no damage to anything. But if you are trying to save money, then why not run the inexpensive JASO MA RotellaT 15-40 for $13 a gallon and change it twice a year? I am not being sarcastic or critical, but your cause and effect analogy holds little water. You could change the oil weekly or yearly and not have any oil related issues, because modern oils are so very good. The only oil related issues of this century were the fantisy change intervals dreamed up by marketing depts that caused engines to sludge up ...
It would be interesting to see if the Official 10-30-40 reccommended by Mother Honda does produce better milage than 15-40. It may well do that. Our circa 1985 Honda Civic Wagon had us use 10-30 IIRC in the standard tranny for better milage and that sucker got 40 mpg over the road. Now many cars use 0-w20 or something like it for better milage.