Used car oil use

[mcdjl]

I've bought a second (fifth) hand Saab 9-5 aero. At start up theres sometimes a significant smoke cloud, which may take a few seconds to disperse. This is coupled with the occasional puff on acceleration. The oil use is significant (in my opinion). What level of oil use is/would be considered reasonable on a car of this age (2013/145k) in other peoples opinion? The dealers I bought it from do already know I consider it to be excessive.
Cheers!

[mcdjl]

I was saying used car as I do expect older cars to use more oil. It is a turbo. We're talking 1l/week, roughly 200 miles.

[mcdjl]

Exige77 said:

(2013/145k)

Is this a typo ?

Sorry, year/mileage.
Yes there does seem to be some oil on the underside- turbo/non gear box side but no obvious source. The occasional puff when accelerating, heavier closer to start up.

[mcdjl]

vtecyo said:

I think that's what he meant... it's done 145k miles in 2 years?

yes its an error...d'oh. As you guessed 2003.

[mcdjl]

thebraketester said:

^^^ This.... try 5W40 or 10W40. Start withe the "quick" fixes first.

The dealer had an oil change done when I bought it which was 10W40. I think thats all gone now. (and it did cost me more than that)

[mcdjl]

Cheers for the advice guys. I'm guessing at the moment that the oil user might be throwing the coil pack sensors as these are giving an intermittent warning light? This was made better by changing the spark plugs.

[mcdjl]

Cheers for the details, is the eBay seller an angry ginger? The warning codes are 1312 and 1334 that come back every now and then. 1340 was around but went when I put in the right ngk plugs... I did go for the cheap simple fix first!
I was just wondering if oil in the air might be confusing the sensor set up despite being a fairly common thing on its own right.
Cheers!

[mcdjl]

paulmakin said:

those are def misfire - 1312 is cylinders 1 or 2 and 1334 is cylinders 3 or 4 - so new plugs will have helped and maybe even fixed it. Might want to check the new plugs and see if thsy're oiling up secondary to oil in the inlet tract.

i think 1340 is the cam position sensor but don't quote me. This should help you isolate the fault though:

http://saabinfo.se/og-9-5/error-codes/obd2-error-c...

paul

Apparently the cam sensor is actually part of the di unit function. The old plugs did have a smear of oil the lower thread as well as being old looking. Is me hoping that fixing the oil user might also did the errors.... Optimism rather than realism at this stage!

[mcdjl]

Cheers for the advice and pointers, at the moment the car has warranty from the supplying dealer, so I was trying to gauge what would be a reasonable condition for it to be in. As you say the di pack is straight forward, I virtually did it for the plugs, (its had them for about 500 miles now and the lights come back since) the turbo is slightly more involved!
The dealer seems amenable for the moment so I'll report back in a few days!