I completely forgot about this and have been meaning to ask this a while. When fall rolled around I had winterized my fathers boat since he hates working on cars/trucks/boats/etc..
I always used the factory fill of Sierra? lower unit oil. The stuff that is green. Unfortunately they did not have it in stock at the time and one of the guys told me I could just use a 80w-90 gear oil. I think I used some regular valvoline 80w-90 (can't remember if it was GL 5 or 4 will have to check sometime this weekend).
If it was a GL-5 can it be run safely in a mercruiser lower unit? Or should I replace it? Would a GL-4 be ok?
Thanks for any input
I always used the factory fill of Sierra? lower unit oil. The stuff that is green. Unfortunately they did not have it in stock at the time and one of the guys told me I could just use a 80w-90 gear oil. I think I used some regular valvoline 80w-90 (can't remember if it was GL 5 or 4 will have to check sometime this weekend).
If it was a GL-5 can it be run safely in a mercruiser lower unit? Or should I replace it? Would a GL-4 be ok?
Thanks for any input