So, comments appreciated, when doing 2 oil filter changes per filter
Take off filter, let drain out what will drain out, then put back on OR
leave that extra cup or 2 of old oil in the engine with a 4 quart capacity.
On my BMW motorcycle, it really likes 5W40 rotella in the winter. But once it hits 80 ish the engine is supposed to have 20W50 (use castrol activo) and is much quieter. Normally I will ride 2K in the winter, and about 6 to 8 K in the summer. So I am draining oil with less than 8 K on it, and it is pretty clean. Brown, not black.
BMW filter is like $18. OK, there are cheaper ones but it is what I use. For 6K miles, no biggie. But for 2 K miles, seems a waste. So in the fall, I take it off, drain (it has no drain back valve) refill (since with no drain back valve, can fill from the outside in) and then put it back on. Part of the reason is changing brands. I do not want that cup of different brand oil in there. I am careful to keep it clean Never had a leak. Been doing it for years now.
What would you do?
Rod
Take off filter, let drain out what will drain out, then put back on OR
leave that extra cup or 2 of old oil in the engine with a 4 quart capacity.
On my BMW motorcycle, it really likes 5W40 rotella in the winter. But once it hits 80 ish the engine is supposed to have 20W50 (use castrol activo) and is much quieter. Normally I will ride 2K in the winter, and about 6 to 8 K in the summer. So I am draining oil with less than 8 K on it, and it is pretty clean. Brown, not black.
BMW filter is like $18. OK, there are cheaper ones but it is what I use. For 6K miles, no biggie. But for 2 K miles, seems a waste. So in the fall, I take it off, drain (it has no drain back valve) refill (since with no drain back valve, can fill from the outside in) and then put it back on. Part of the reason is changing brands. I do not want that cup of different brand oil in there. I am careful to keep it clean Never had a leak. Been doing it for years now.
What would you do?
Rod