I did a search for this on the forums and couldnt find anything so here goes.
Does Restore crankcase additive really work to raise compression in an engine?
I did a compression test today and came up with cyl 1 at 205, cyl 2 at 190, cyl 3 at 205 and cyl 4 at 130.
max comp is supposed to be 218 and min 145. since I have only 150k miles on the engine and it still runs good, should I use this Restore stuff and does it work? I hate to get a rebuild at this point. Im using mobil 1 synthetic and have for the past 90000 miles. when I added a bit of oil to cyl 4 compression came up immediately. so Im thinking its the rings. would it be worth the money to get a leakdown test done at a shop?
I dont want to do anything to further harm the engine either so of course Im coming here where I see the best advice. Im a big lurker as I usually dont have much to add to posts so dont let the super low post count bother you.
Oh yeah, I dont know if it matters but the vehicle is a 2001 toyota corolla.
I appreciate any advice.