308 QV Engine Oil Debate

+1 on the Castrol GTX 20W50.

Phil
US Spec 1984 308QV

 

+2 Castrol 20/50

 

Redline 5w50

 

I used to use Castrol but now use Mobil 1

 

Royal Purple 20/50

http://www.lubricantsandmore.com/index.html

 

Mobil 1 15w50, but I will see what they recommend at Competizione shortly...

 

I use 10/40 as 10/50 is almost impossible to find. I only use synthetic and I'm not loyal to any brand, but I'm not buying an off brand to save a few bucks. I have seen no problems in both hot and cold weather. I use Baldwin filters and have never had to pay over $12.00.

 

Won't synthetics leak right thru the castings on an old Ferrari engine, leaving it all on the floor overnight?


(sarc mark goes here)

 

For those of you searching for a 10w/50. Total Quartz racing makes a 10w-50 and it is pretty good stuff, and it comes in a neato bottle. I have been using it for about 7 months now due to the changes Shell Rotella T 5/40 went through.
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Another satisfied Castrol 20/50 user.
I do add ZDDP however.

 

I got Redline 10W 40. Speaking with the Redline rep, he says that they can provide 10W50 if anyone insists on sticking to the original spec.

 

i have been using Red Line or Royal Purple 10-40 in my 3.2 911 Carreras, and several of the 308s i have had in the last 3 years or so. 20-50 is too darn thick. i add BG MOA to have the ZDDP covered. i put less than 3000 miles a year on my cars, and only keep them a year or so. all of them revved easier and run cooler with the thinner oil. all of the cars had great oil pressure, even in the hot Georgia summer.

no way will i run 20/50 anymore.

 

You would if you had turbos!