Question about 1999 Saturn SL

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Oil I just bought a used 1999 saturn sl2 and the car has about 85000 miles on it. I thought about putting synthetic oil in it but did not know if that was a good idea or not. Also would like to know what grade oil to put in it that will keep it running smooth.

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Running synthetis will be fine. run either 5w30 or 10w30

Posted on Nov 06, 2008


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Do a major tune up,plugs,wires,air filter,and fuel filter,replace the p c v valve,and clean the throttle body,remove the black carbon in the intake.Change the oil,and use a synthetic oil,use the oil it calls for,as the weight of the oil is important on these models.

Jan 25, 2010 | 1999 Saturn SL

1 Answer

Just bought a 98 Saturn SL2 that is in excellent shape but high miles, mostly highway miles. It has 210,000 miles on it but was well taken care of and sounds and drives great. Had a new transmission put in...

Hi Darlene,

These engines can go well beyond 500,000 miles, and I know several people that can attest to that. There is one important thing you must know. ALWAYS check your oil at every gas fill up! Your SL2 is probably burning oil and needs to be checked. If you let it get too low you will spin bearings in the engine and it will be rendered useless. Check the oil and keep it at the top of the hatchmarks. It's a good idea to get two quarts of oil and leave them in the trunk this way you can fill as you need it.

The idle is probably the Idle Air Control valve (IAC). It is probably dirty and needs to be cleaned. Removing the throttle body and cleaning with carb cleaner to get the carbon off will get your idle working again. You cannot reset idles on these car and DO NOT touch the idle stop, that is not how idle is managed nor adjusted. The idle should be 1,200 RPMs cold and 800-850 warm.


Jan 17, 2010 | 1998 Saturn SL

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