Re: New available motor oil

Posted by 55PackardGuy On 2014/8/3 19:49:25

I was able to test out the straight 30 weight detergent oil in the heat today. A drive of several miles did indeed result in the engine oil light coming on. I stopped and added 15 oz. of STP, which I had along with the intention of adding to a warm, running engine (which circulates it best). The oil light stayed on for the rest of the drive, during which I never reached speeds over 40 mph.

I parked the car for a few hours at a friend's (my destination) and after that I drove it home, still in 85 degree+ temps. The oil light stayed off for the first few miles, started flickering, and then was on until speeds of about 50 mph were reached, at which time it flickered off.

Having been informed in an earlier post that Packard said this was "normal" in the straight 8, I didn't worry too much. There were no odd noises or fanfare.

I have decided that having the straight 40 wt that I had in before the last oil change was a better setup. Next change, I intend to put in 10w-40. This, based on the earlier post about better film strength with a multiweight.

Once again, if anyone has had good experience with a "conventional" 10w-40, I'd be interested to hear about it.

Thanks. This thread continues to be very helpful to me.