smokersteve

Hey guys!
I own a 1974 911S 2.7L
I have been using 15w-40 diesel oil. Is this bad? I'm on top of oil changes with top brand filters. Mann, mahle, beck arnley...
Should I go to a different oil? Mobil 1 15w-50? Mobil 1 v-twin 20w-50?

Thanks!

myflat6

I use Brad Penn 20W/50. Great oil.

grgallo

i use Brad Penn, highly recommended for our air-cooled machines

bakerphoto

Penn 20/50

smokersteve

http://www.amazon.com/BPEN-20W50-12-Brad-Penn-Partially-Oil/dp/B004WKH0VQ

This?

rstarga

Another oil thread.... I use Mobil1 15-50. $23 for a 5 quart bottle at Walmart.
Plenty of ZDDP and cheaper too.

myflat6

I have been using this seller on eBay:
https://www.ebay.com/itm/190516736447

ron mcatee

Valvoline 20/50

smokersteve

Which is better. Penn or mobil v-twin?

FormulaRX

Agree. M1 15w50 for me too. 1,300 ppm zddp and there's even a $12 off coupon for 5qt jug thru end of March making that $23 only $11 lol

FormulaRX

Asking for opinion on oil is like discussing politics. Truth is both are fine. Buy whatever is cheaper

tgil

BP for me as well in the 1980. Found a good deal for a case on Amazon couple months ago. I use stock classic oil filter(reddish in color) that I bought at the Eastern Porche Tech Center at the recent Tech Tactics.

theiceman

yeah im not a fan of Mobil one .. but im sure they are all good oils.

BP for me too.

911 Rod

I used to use mobile 1 and switched to Penn a couple of years ago.

Both good oils.

GothingNC

I use Valvoline VR-1 20W-50.