keithkz
Well-Known Member
What viscosity oil are you guys putting in your I/O? I have the (2005 year) 5.7L Volvo Penta (280 HP) which is basically a 350 Chevy. I changed the oil myself 2 years ago and honestly cannot remember what I used other than it was Mobil 1. I have the engine manual and in the chart it lists 30W, then 20W/50 and then 15W/50 for outdoor temps 32 degrees and warmer. You can't get Mobil 1 in 20W/50 but you can in the 15W/50. Here's the kicker though.....to the right of that chart in my manual it says:
"Use single viscosity oils in markets where available. The use of multi-viscosity oils such as 10W-30 and 10W-40 is not recommended unless single viscosity oils are unavailable."
Straight 30W is what I use in my push lawnmower and I was also told this weight oil does not have a detergent and I shouldn't use it in a big engine like I have.
So what should I put in it?
"Use single viscosity oils in markets where available. The use of multi-viscosity oils such as 10W-30 and 10W-40 is not recommended unless single viscosity oils are unavailable."
Straight 30W is what I use in my push lawnmower and I was also told this weight oil does not have a detergent and I shouldn't use it in a big engine like I have.
So what should I put in it?