Quote:
Originally Posted by David70
At what point is 15W50 better than 5W50 when it comes to adequate lubrication? From your second response above, best I can tell is the 5W50 may not be needed but why wouldn't you prefer it?
Also, why did you go with Redline 15W50 over the Redline 10W60? Seems like 10W60 would be the normal choice, any data to back up 15W50? You said lower operating temperature but wasn't this at the same time of changing weights and brands of oil? Just curious.
Some tiny amount better mpg makes no difference to me compared to a little less bearing wear.
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Probably only at startup on a cold day. Otherwise they are very similar. As you probably read above some are getting the 15W50 recommendation from engine repair folks when bearings are replaced. Not sure why it is really
better than 10W60, but this is the recommendation.