I'm about to do an oil change and I'm trying to decide which grade of oil to use...

Would it be advisable to run Mobil 1 0W40 Synthetic in a 02 WRX?

I live in Toronto, Canada and our winters can get pretty brutal.
I have a short drive to and from work, barely enough warm up the engine.

Any suggestions would be greatly appreciated.

I've read here that it is the recommended oil for BMWs and VWs and that it is a good choice.
I am currently running it and I must say that oil consumption is spectacularly bad. Like 1qt in 2K miles or less.

The M1 0w40 will work well, but if you rarely get the car fully warmed up, I would use the 0w30 instead. Make sure you change the oil at 3k intervals, short trips are hell on oil due to how rich the engine runs when cold and not warming up fully doesn't burn off all the water that condenses in the sump.

Make sure you avoid romping on it for at least a few minutes after the temp gauge hits normal levels.

I work in the parts dept. at a Porsche dealership and Mobil 1 0W40 is all we use for Cayenne (Turbo and N.A.), 911's (98 and newer Turbo and N.A.), and all Boxsters.

Granted there is a bit of consumption on the Turbo models but its only to be expected.

should be using 5W-30 per manufacturers directions regardless of brand name.

Believe it or not Porsche recomends changing the oil every 24 000kms or once a year for the 996, 997, and all Boxsters (9 litres of oil).

For the Cayenne, Porsche recomends 30 000kms or once a year (8 litres for the V8 and 7 litres for the V6).

should be using 5W-30 per manufacturers directions regardless of brand name.

Incorrect. The manual lists a temperature range and different weights of oil for each range. 5w 30 just happens to be very common. Read what Uncle Scotty has to say about Mobile 1 5w 30. :)

Believe it or not we recomend changing the oil every 24 000kms or once a year for the 996, 997, and all Boxsters (9 litres of oil).

For the Cayenne we recomend 30 000kms or once a year (8 litres for the V8 and 7 litres for the V6).

..and yet again the oil change myth raises it's ugly head.

..and yet again the oil change myth raises it's ugly head.Those Porsche's have huge sumps. No problem running long oil change intervals as long as you get in a good trip to fully warm up the engine every now and then.

should be using 5W-30 per manufacturers directions regardless of brand name.
the manual also says 10w-30

Those Porsche's have huge sumps. No problem running long oil change intervals as long as you get in a good trip to fully warm up the engine every now and then.

And the oil/water seperators help too.

should be using 5W-30 per manufacturers directions regardless of brand name.

I agree with Boxxxer, the manual does list 40wt as appropriate for hotter climates, like here in central FL. We had 40+ days over 90 degrees this summer, and I'm not gonna run 30wt in those conditions. I've been running Mobil 1 0W40 with no problems.

I was running Mobil 1 15W50 Synthetic for the summer months with no probs.

In Toronto our summers can get as warm as 35C/95F and our winters as cold as -40C/-40F

Why people always use other cars as an example for oil change when the owner's manual is right in the glovebox?! :p

Porsche, BMW, Viper, ... so?

A car sells at higher price doesn't mean the suggested oil change interval and oil grade is suitable for Subaru, IMHO. :)

Why people always use other cars as an example for oil change when the owner's manual is right in the glovebox?! :p

Jeez, don't you get it? Nobody reads that thing?! :p

0W40 would be a great choice, unless you make short trips as drees already mentioned.

-Dennis

I'd rather do what my vehicle manufactures recomends instead of what somebody thinks I should do based on some GM recomendation or another.

I'd rather do what my vehicle manufactures recomends instead of what somebody thinks I should do based on some GM recomendation or another.

If I lived in Florida I wouldn't even think of using anything thinner than a 10W40, although I would probably use Mobil 1 Synth 15W50.
Car manufacturer provide a guideline, as they cannot account for all driving conditions and weather conditions.

Like I said in a previous post, our winters get pretty cold here, I'm hoping that somone may have an opinion on a 0W40 weight in cold weather climate.
I know the difference between a 5W30 and 0W40 isn't far off.

I don't want to piss anyone off, but I would like to get people thinking, asking questions and discussing different oils/grades/ etc.

Like I said in a previous post, our winters get pretty cold here, I'm hoping that somone may have an opinion on a 0W40 weight in cold weather climate.
Mobil1 Synthetic 0W40. New England (Mass./NH border) winters (and summers). No problem. No oil consumption. 6000 mile oil change intervals.

Synthetic oils have longer change intervals than conventional (dino) oils. They are more stable and have better long-term lubricating properties.

There is a recent thread, I think in the Service&Maintenace Forum, that talks about synthetic oils. It references some testing a Company did on synthetic oils, which included Mobil1, Redline and AMSOil. They even used oil analysis as part of the testing process.

End result for Mobil1: With no oil consumption, the oil maintained its properties for 8000 miles before it needed to be changed. I don't remember the oil weight.

Depending on how much oil consumption the particular engine had, that oil change interval was actually extended since the addition of new oil to replaced the lost oil brought the oil properties back up to "safe" levels.

Mobil 5W40 T&SUV FTW

^^ supposed to be good stuff go over to

bobtheoilguy.com and run a search for m1 5w40.

a correction needs to be made...
the correct web address is www.bobistheoilguy.com

hehe my bad.

Would it be advisable to run Mobil 1 0W40 Synthetic in a 02 WRX?

It's fine. I used that weight oil in my STi on my first oil change. Did an oil analysis which showed I could have run longer than the 7500 miles I did on the oil.

should be using 5W-30 per manufacturers directions regardless of brand name.


http://tinypic.com/foq694.jpg




WAKE THE HELL UP!!!!!!!!!!!!!

*feel* the anger of red-


behold,

the effectiveness of exclamation points

If you notice from the chart(SUBIE),5w-30 would be fine for you winter and summer temps as you posted earlier,-40 to 95 deg.F .

If you notice from the chart(SUBIE),5w-30 would be fine for you winter and summer temps as you posted earlier,-40 to 95 deg.F .




.....d000d....go ahead and pour water in the crankcase....and drive it hard in the summer heat.....go ahead......you can do whatever ya want.....


But I'M NOT that STUPID.

It's fine. I used that weight oil in my STi on my first oil change. Did an oil analysis which showed I could have run longer than the 7500 miles I did on the oil.

Where did you get an oil analysis done?
I'm very curious to know whats going on in the engine.

The 0W part will be great for Canadian Winters. Once up to operating temperature the 40 part will be a lot heavier than a 30 oil. Meaning harder for your engine to move the oil. You might want to get a 0W-30 if you can find it. A lot of people like using Motul 5W-40 here in Alberta, but I have yet to try it.

I think you won't find any difficulties with the oil.

Where did you get an oil analysis done?
I'm very curious to know whats going on in the engine.

http://www.blackstone-labs.com/index.html