12-17-2014, 11:32 PM
I never worried about mixing different brands of oil or different weights as long as the weights were very close. And the two letter service grade was the same or also close. Like in 10W-30 and 10W-40. I generally follow the rule that "Oil is good. No oil is bad." Never had any issue with any vehicle that I owned.
The above experience applies in the past to my older cars. Even my present day cars with 130,000 or so on the ODO don't burn any oil. ( My family drives four Toyotas. Three of them have between 120,000 and 135,000 miles on them )
Most of us seem to change our oil in our bikes at between 2K - 4K miles. If you are regularly faced with adding a quart or a half quart of oil to your motorcycle, then I'd say you have a problem somewhere. Unless said motorcycle has very high mileage.
The above experience applies in the past to my older cars. Even my present day cars with 130,000 or so on the ODO don't burn any oil. ( My family drives four Toyotas. Three of them have between 120,000 and 135,000 miles on them )
Most of us seem to change our oil in our bikes at between 2K - 4K miles. If you are regularly faced with adding a quart or a half quart of oil to your motorcycle, then I'd say you have a problem somewhere. Unless said motorcycle has very high mileage.