Originally Posted By: gfh77665
Originally Posted By: ARCOgraphite
The SAE 30 may be too thick at low temps... I think the sae 30 should be fine seasonally over 80 deg F.
So 75 would be a "low temp"?
Many charts show 30wt. is acceptable down to either 40 or 32 degrees, depending on the vehicle. They all show 40 and up is OK.
The specs on my Delo SAE30 make it look more like a 15W30 or 20w30. I've used it as a 3 season oil and have had no issues at all. I remember a few years ago in one of these thick/thin oil threads where BuickGN and I started our vehicles with SAE30 and 20W50 when it was cold. My kid started one of our Jeep 4.0L’s with Delo SAE30 at 20-something degrees F and oil flowed immediately from the rockers. No jello or slime mind you, it was good flow. Scientific – no, but IMO SAE30 is not going to cause any issues at all (besides a fuel penalty for drag), safely down to 32*F.