Fix leaks and switch to oil specified in owners manual.. cheapest 5w-30 conventional ?? you can get. I have 5 fills (5000 OCI) 5w30 FVP conventional at $2.50/qt..WIX filter. My 2005 3.5ltr V6 loves it.. -25F to 100F.
rear main/oil pan leak got worse, move to 10w30? or switch to conventional?
- Thread starter jalikaria24
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Find another Mechanic and fix it if you plan on keeping it.
Hi guys. The OP hasn’t been heard from on this topic since last July. Interesting topic though. 
Last edited:
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- Jun 25, 2021
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Replace the seal
Hopefully in the two years since the OP posted the question the problem has been resolved.
LOL why would you fix it. Next time you have arterial bleeding ask for a Band Aid!
This is a common thing here. Most of these types of threads never have a conclusion but they get regurgitated later on like it’s a current thread.
This. Best thing for a LS motor.
$1200 sounds excessive. Check with a reputable transmission shop. When they rebuilt my transmission a while back , a new rear main seal was no extra charge.
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- Oct 30, 2021
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Anybody have luck with Motor Savee by Liqui Moly?
With most shops these days the bottom line is much more important than a happy customer.
Exactly
1 quart of oil over 3 months isn't horrible. I had a Cadillac that lost a quart over a few weeks 
Throw a bottle of AT-205 or BlueDevil Rear Main Seal in the oil and run it for the duration of the oil change. I can just about guarantee you it'll seal up. (It won't stop anything up, it swells the gasket.)
Throw a bottle of AT-205 or BlueDevil Rear Main Seal in the oil and run it for the duration of the oil change. I can just about guarantee you it'll seal up. (It won't stop anything up, it swells the gasket.)
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I was just gonna recommend Blue Devil Rear main sealer too!
I’ve heard many great things about those. It seems like they really do work. Won’t hurt to try it out. Just use any 40 weight oil with the blue devil and run it for a couple hundred miles, and see if the leak slows down. I would use 40 weight since that blue devil stuff seems pretty thin. I might be wrong.
After you add the blue devil stuff in, clean the bottom of the engine as good as you can. You’ll never know where exactly the oil is really coming from especially with how much oil you’re losing.
I like to use acid wheel cleaner. Just spray it all over, and wait 30 seconds. Then rinse it off with a pressure washer, no need to crawl under there and scrub things. Just spray then rinse. Acid wheel cleaners won’t damage nothing, as long as you don’t let the chemical sit for too long on rubber and plastics.
Drive for a couple weeks with the blue devil, and try to look under the engine at least every other day.
Now you’ll really be able to see where the leak is coming from, and also you’ll see if the leak is slowing down at all.
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