aglaes

I've owned my 951 for about a year now. After I bought it, I had a local shop do an oil change and flush all the fluids. I'm really not sure what weight motor oil they used - shop claimed it was recommended by Porsche for the car. I just recently changed the oil myself. I used Valvoline VR1 20W50 Racing Synthetic oil. After warm-up I used to get idle oil pressure of about 3 bar. Now I get about 4 bar at idle. I don't presume this is an issue, but just wanted to run it by this group and see if anyone thought that was normal, etc...

black944 turbo

Normal, if very hot mine will go down to 3 bar.

mahoney944

On cold start 4 - 5 is normal at idle, warmed up is between 2 and 3

INURGRL951

There are a few oil filters that make a difference in the pressure. I always just use a maule or ( can't remember the name at this time ) I noticed lower in the past with a fram so i have stayed away from them.

67King

INteresting. When I ran VR1, my oil pressure at idle was under 3 bar. Didn't really get above 4 bar. When I switched to Motul 300V, it was over 4 at idle, and 5 above. The Millers is a tad lower than the Motul at idle, same at higher RPM. It all generally tracks with HTHS viscosity.

URG8RB8

I run Valvoline VR1 20-50W synthetic in my CA car. Upon cold startup, I have 4.5-5 bar and almost never drops to even 3 bar. I have around 3.5 normally with a coolant temp of 186. I use the K&N filter.

numbskull

Always used mobil 1 with mahle or now k&n with great results. Interesting link..

http://www.mobiloil.com/USA-English/...cker_Oils.aspx

333pg333

Bet they were running M1 in your car as this is what Porsche recommend for all their cars. Most of the oils from Mobil aren't suitable for our cars in above freezing conditions. Too thin and too little ZDDP. Consult your owner's manual to see what viscosity is best for your climate.

numbskull

Definitely agree temp range makes a huge difference with oil type. In summer 100f I would tend to use m1 with a bit more lucas oil stabilizer along with zmax snake oil additive. In 15f straight m1 and zmax works fine for better startup. There are other brands that would work good as well. Recommended or not, 13yrs w/o issues with this mix on original '86 block. Would not use lucas in winter, it is too thick.

mtnman82

Even the same oil in colder weather will read slightly higher until things warm up (colder = thicker = higher pressure). Glad to hear I'm not the only one using the K&N oil filters. I have Mahle's too, but got a deal on some K&N's a while back and picked them up because they have the anti-drain valve.

URG8RB8

Almost all spin on filters have anti-drank back valve. The filter media in the K&N is slightly better than the Mahle. The 1" nut on the top of the K&N is a nice feature. Both are by-pass type filters though, so even at normal ambient temps of 75 degrees 20-50W will be bypassed until the temp comes up to around 100. I don't like this feature and have developed a work around. I gave the design idea to LR, because I don't want to deal with that end of it. I am now running a non-bypass Fram Ultra with far better filtration media amongst many other new features. I simply had a replacement oil filter stud made and replaced the 20 X 1.5mm version with a 3/4 X 16 SAE adaptor. This allows you to use much newer filters with much better technology. It also accepts Fram HP-10 racing filters for super high flow characteristics for racing applications. This filter also maintains a bypass valve and has SS encapsulated filter media with a huge burst strength. I did months of research on this stuff with countless calls to engineering departments. There are many other brands that will fit this thread size as well, but I don't think you can beat the Fram Ultra for the money, affectionately known as the FU!

mtnman82

Good info - I didn't know about the by-pass part. Is Lindsey going to follow thru with anything?

URG8RB8

I all ready sent them the adaptors. They are cheap, $30. Look at new products section. Honestly they are making no money here, just providing the parts. I will try to find a link tonight.

URG8RB8

FYI on the all mighty FU

Hello,
I am the technical training manager at FRAM. The Ultra filter is the new name for the improved XG filter. The part numbers are the same. The improvements consist of taking efficiency from 97 to 99% using ISO 4548-12 tests with particle size in the 20 micron range. We also improved the media to increase capacity up to 32 grams in the XG8A size. We are confident all sizes have the capacity for 15k oil changes when used with high quality synthetic oil.
We have now begun production of made in usa cartridge filters as well. This includes the standard Extra Guard line and we will now have long life Ultra cartridge filters. All made in USA. For those who do not know, the construction of the Ultra filter consists of flanged steel end caps that capture a pleated mesh screen. The screen has two layers of synthetic glass media. They also have a silicone antidrainback valve and a new silicone/nitrile combination square cut O ring.
Happy to answer any questions you may have.

eman930

I never liked Fram filters, but thats just me