The Ford Barn - View Single Post - 49 ford 6 volt positive ground with pertronic ignition

JSeery · 11-22-2018, 08:06 PM

5w20 is not the same as 20w. The "w" stands for "winter" rating, so the 5w is rated at the winter temperature rating and the 20 at the normal high temp rating.

11-22-2018, 08:06 PM	#15
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: 49 ford 6 volt positive ground with pertronic ignition 5w20 is not the same as 20w. The "w" stands for "winter" rating, so the 5w is rated at the winter temperature rating and the 20 at the normal high temp rating.