Good answer. However your manual should state 0W-30 or 0W-40. The last year or two 5W-30 and 5W-40 have been added.The official answer is to use an oil that meets GM LL A 025 spec. Not sure if it's the same in Canada, but the two most common oil that meet the spec here in the states are Mobil 0W-40 and Catrol Syntec 5W-30 (Made in Germany) which is only available from AutoZone. There are also other oils that meet the spec from Motul, Total, and Amsoil.
GM LL A 025 SpecThere is no 5W30 that meets the GM LL A 025 Spec in the US market.
You may have it in Canada. If you use a non spec oil change it sooner. And you have an 03, ignore the SID, it is calibrated to an obsolete standard Mobil 1 0W40 was re-certified and the Interval dropped from 15K/2yrs to 10K/1yr.
Mobil does make a 5W40 that meets the GM LL B 025 Spec, you can use B in Diesel or Gasoline Engines, A is Gasoline only. I myself never heard of anyone recommending or using it in the SS.
He's an 03... if he goes by his manual he's going to go 5000 miles too far or a year too long on Mobil 1..... The Oils rating was changed in 06 to 10K/1year. Spec 0W40 is easy enough to find... Mobil 1, Castrol Syntec, Gulf GTX and several other brands.Look it up in the owners manual and follow the recommendations.
Considering we've both discussed this topic a million times before (Jon V)... I think were mostly on agreeance. Going 10k miles without an oil change, especially at the mileage me and him are at, is pretty dumb.JonV, I can't believe you let the post above yours go without comment . . .
I'm trying to imagine how some one (who isn't either racing, driving continuously in 140 degree temperatures, or doing a lot of off-roading in dusty conditions) could possibly "abuse" their saab enough to cause their oil to breakdown to such an extent that it would require changing it out at half the suggested interval . . .
Never say never I guess . . . but zero chance of this occurring if you do the majority of your driving on the street in city conditions (no matter how much street racing you do) imo . . .
I do a lot of stop and start driving short distances and the oil is usually quite dark when it get changed. I look at it this way I pay CA$90 for an oil and filter change probably twice a year that may save me a ton of money in a few years time. My car is nearly six years old (I got it in Aug08) and I intend on running it into the ground and replacing it with a second hand 9-5 (the model due out this summer) when it does head off to that scrapyard in the sky.Dude (as in Zippy) . . . you must seriously love your car . . or have wayyyyy to much time on your hands. Most people are switching it out every 10,000 MILES (as in 16,000 km's) !!!!