weldcrane

wondering what brand oil and weight should i be running live in new england and only drive the car in the summer months thanks it's a 97 993 non turbo

tctung

Fully synthetic 15W-50 any namebrand. I use Mobil 1 and/or Motul, change oil every 6K miles or every year whichever comes first.

ble2011

Exactly what I use and do.

lemonlib

Total from europe has the requirement for porsche, bmw and audi . Id stick brad penn but that messes up the cats. Zinc

Pags993

+1 full syn 15W50 any major global brand will do

Quadcammer

unless you are burning sufficient quantities the cats will be fine.

mobil 1 had that much zddp when the car was new, so I wouldn't be too concerned about the cats.

surprising Mobil 1 V-twin 20w-50 is not more popular for the naturally aspirated owners.

Pags993

Good point Qudcammer re the M1 Vtwin 20W50, excellent choice for air cooled engines which run much hotter especially in the summer months. I am going to give it a shot this summer.

Paddy

I use Swepco 20W50 in my track car. Oils are like religion around here.

Pags993

As someone with over 10 years in the lubricants business in North America I always get a good laugh from the "my oil beats your oil arguments" and some of the rationale used as to why. The one thing i can confirm without an ounce of hesitation is that most here only use about 33% of a synthetic oils true potential with respect to drain intervals.

mongrelcat

...

Pags993

I guess the expert has spoken. I review thousands of UOA and VOA samples a year in my profession. How many do you send off annually to review 2 maybe 3? My argument is based on global brands who all have the Porsche approval and have met the benchmark guidelines set by the OEM. Sure bathtub blenders and rerefiners are in another class altogether that frankly arent even worth mentioning here.

I gave my opinion re the OP question above based on the set of criteria he provided.

mongrelcat

...

IXLR8

How true. Europe went to 20K kilometer drain intervals ages ago where everyday daily drivers run at 200 k/h.

One of my co-workers performs drain intervals at 25K kilometers (15.5K miles) and then has the oil tested in our labs where guess what....drum roll...its still good. And his car has big miles at this point being a 2000.

timothymoffat

Yippie.......an oil thread.

Steve Weiner-Rennsport Systems

+++1