Join Date: Mar 2007
Thanked 3 Times in 3 Posts
Rep Power: 10
Yes, Same oil in the transmission as in the crankcase for 1GM, 2GM and 3GM.
However, if you are in a temperate climate, the transmission will be fine with a straight 30W oil (properly rated.) I mention this, because the transmission oil usually does not need to be changed as often as the crankcase oil. So if you use 15-40 or 20-50 crankcase oil during your hot season, and change over to a 10-30 during your cold season, you would be probably be fine just going with a straight 30W in your transmission the entire time. The transmission will be warmed somewhat by/during engine warm-up, so it is not as critical to have a multi-weight oil for cold-weather starts.
That said, a 15W-40 works well in both the crankcase and transmission for the temperature ranges in which most of us typically sail.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Pacific Seacraft Crealock 31 #62
NEVER CALLS CRUISINGDAD BACK....CAN"T TAKE THE ACCENT