Actually normal compression should be around 140-150 psi for all eight cylinders in your SUV. Sorry to hear your problem is so severe. Bummer buddy. Now you see what I was talking about in my earlier post about cats. Are you having any top end noise? Most common problems are a worn rocker, or stuck lifter. Either way, you or the shop would have to determine if your compression loss is a valve or bad rings. Here's a Hail Mary pass you can try. Pour about 16 oz of Marvel mystery oil in your oil. If you have sticky rings, or something stuck in the top end, it might bust it loose. Again it's very doubtful it will work, but what have you got to lose. You don't have cam phasers or solenoids to worry about, so you'll only be out about $7.00 or so. I had a nagging feeling a year back when you were thinking about this vehicle, that car lot wasn't being honest. Especially at the premium price you paid, but theirs nasty people in this world, and you found one of them!
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