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  • Burning oil??

    hi i have a 96 sl2 and i have been burning about a quart of oil every 1500 miles, this has been this way since it was new i was told from the last owner. I have read that these dohc engines are notorious for burning oil, i have done a compresion test and iam 102-103 in every cylinder, and i know factory is around 98psi, i do not have smoke coming out of my exhaust, and never have seen any, if u didnt know it burned it you would have no idea of knowing. anbody else have any problems with this? and way to reduce consumption.

  • #2
    no i believe factory piston compression is 220psi . if you have that low of compression you have badly worn rings. also how many miles are on the car. the valve seals tend to wear out kinda fast too.
    2007 chevy classic 2500hd 4x4 duramax
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    • #3
      Originally posted by sl2racer
      no i believe factory piston compression is 220psi . if you have that low of compression you have badly worn rings. also how many miles are on the car. the valve seals tend to wear out kinda fast too.
      i was thinking it was like 210? oh well, yeah your compression is way off. your rings are gone it seems to be. not literally
      Ian---The Fat Ass

      1995 SL2-High compression engine FOR SALE
      2010 Chevy Cobalt SS- tuned with plenty of goodness
      2002 SC2-New daily
      2017 Kawasaki Ninja 650 KRT- got a stupid deal
      2003 Ford Taurus SES- free daily beater

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      • #4
        sorry i meant to say 205 psi, according to my manual 190 is standard and 180 is the service limit

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        • #5
          110,000 miles

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          • #6
            haynes manual? if so might as well throw it away.

            but did the compression build up to 205 or did it jump straight to 205? i bet its still the rings.
            Ian---The Fat Ass

            1995 SL2-High compression engine FOR SALE
            2010 Chevy Cobalt SS- tuned with plenty of goodness
            2002 SC2-New daily
            2017 Kawasaki Ninja 650 KRT- got a stupid deal
            2003 Ford Taurus SES- free daily beater

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            • #7
              it went up to 205 right away

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              • #8
                well it wouldnt hurt anything to do a piston soak.
                Ian---The Fat Ass

                1995 SL2-High compression engine FOR SALE
                2010 Chevy Cobalt SS- tuned with plenty of goodness
                2002 SC2-New daily
                2017 Kawasaki Ninja 650 KRT- got a stupid deal
                2003 Ford Taurus SES- free daily beater

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                • #9
                  piston soak??

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                  • #10
                    Originally posted by burton95p
                    according to my manual 190 is standard and 180 is the service limit
                    That's about right. 210 would be a fresh engine, or one with alot of carbon built up in it.

                    They all burn oil. There is a flaw with the piston design that allows too much oil to get into the chamber.

                    a 205 compression is good.
                    LSJ powered 1998 Chevy S-10 turbo
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                    • #11
                      Originally posted by Green Monstah
                      Originally posted by burton95p
                      according to my manual 190 is standard and 180 is the service limit
                      That's about right. 210 would be a fresh engine, or one with alot of carbon built up in it.

                      They all burn oil. There is a flaw with the piston design that allows too much oil to get into the chamber.

                      a 205 compression is good.
                      yes i was right [img]{SMILIES_PATH}/biggrin.gif[/img] lmao, i thought it was 210 fresh out of the oven.

                      oh yeah and about a piston soak, its simple. the hardest part is figuring out what solution you want to use to do it. you have marvel mystery oil, gm tec, and sea foam. ive used sea foam and marvel mystery oil. but what you do is pour some of the solution into the cylinders (i normally do just enough to cover the pistons, others tend to really drench the cylinders). since i normally put just enough into the cylinder to coat the piston, i keep checking mine to see if i need to fill the cylinders up with more. i never do. but also some do this while the engine is still warm and put the spark plug back in to keep the heat in. ive done that too. i usually let my car set for at least 12 hours before starting it. but if you put too much into the cylinders, or theres quite a bit left over, then you will need to crank some of it out with the spark plugs removed (pull fuel pump fuse and ignition module connection below coils) and put rags over the plug wells so you dont have fluid shoot everywhere. once thats done but it back together and crank it up. now you could have quite a bit of smoke come out from the solution, or like me where i somehow always put just enough in, the car starts smooth and doesnt smoke one bit at all.
                      Ian---The Fat Ass

                      1995 SL2-High compression engine FOR SALE
                      2010 Chevy Cobalt SS- tuned with plenty of goodness
                      2002 SC2-New daily
                      2017 Kawasaki Ninja 650 KRT- got a stupid deal
                      2003 Ford Taurus SES- free daily beater

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                      • #12
                        coincedence i asked u about this last night? i think not...

                        fate again. come help me ian.
                        <img src="{SMILIES_PATH}/stc.gif" alt="" title="STC Logo" /> - OH The "I Used To Be Bad" Girl
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                        • #13
                          oh molly, when dont you need my help? [img]{SMILIES_PATH}/lol.gif[/img]
                          Ian---The Fat Ass

                          1995 SL2-High compression engine FOR SALE
                          2010 Chevy Cobalt SS- tuned with plenty of goodness
                          2002 SC2-New daily
                          2017 Kawasaki Ninja 650 KRT- got a stupid deal
                          2003 Ford Taurus SES- free daily beater

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                          • #14
                            Sounds like rebuild time.
                            -6S Resident Mechanical Forensics member #001.
                            1995 SC2 Turbo 3.6L DOHC, 6sp manual, Ford 8.8 rearend running on MS3x.
                            1998 F-250 5.4L triton...stock.

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                            • #15
                              How do you check the compression of the cylinders?
                              2002 SC2<br />SPEC STAGE 1 Clutch<br />AEM CAI<br />Motor Mount Inserts<br />2.5 Cat Back Exhaust

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