15w 50 in an LS1???
15w 50 in an LS1??? Its probably a lil to late to be asking this but is 15w50 too thick of an oil for an LS1??? I was using Mobile 1 10w40 but my mechanic told me 15w50 is best for cars with over 100K.
Listen to your oil pressure gauge, not your mechanic. "Optimal" oil pressure is 40PSI at idle, and an additional 10PSI per 1000RPM. I was running 0w40 in mine for a bit, but that is only because the ambient temperature outside was 100 degrees and my engine was constantly running hot because of that. There is no "one size fits all" rule for oil weight, every car is different... your mechanic probably assumes that your car is worn down and such. I'm sure other people can explain better about what oil is right for you, but... just pay attention to how the car runs, and you should be fine.
You will be just fine with 15 or 20w50.
you cannot compare a stroker motor with likely wider bearing clearance to a production motor with (probably) comparatively small tolerances
and remember there is a difference between oil flow volume and oil pressure, think about that...
Last edited by 1994Z28Lt1; Nov 4, 2008 at 03:07 PM.
do you know what your bearing clearances are???
you cannot compare a stroker motor with likely wider bearing clearance to a production motor with (probably) comparatively small tolerances
and remember there is a difference between oil flow volume and oil pressure, thick about that...
you cannot compare a stroker motor with likely wider bearing clearance to a production motor with (probably) comparatively small tolerances
and remember there is a difference between oil flow volume and oil pressure, thick about that...
Over 100,000 miles.....15 or 20w50 is just fine and probably better.
And yes, flow is what lubricates, not pressure.
engine wear depends on so many different things, the idea of making a blanket statement saying "your ls1 has over 100,000 miles, you need to used 15W50 or 20W50" is absolutely rediculous and ignorant
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Verdad Gallardo engine wear is inevitable but there isn't a set rate in which it occurs, it depends on the maintenance the vehicle has received over the years, the types of driving (highway miles are easier on engine) climate (cold winters can cause more wear at start up) as well as the driver and their habits
engine wear depends on so many different things, the idea of making a blanket statement saying "your ls1 has over 100,000 miles, you need to used 15W50 or 20W50" is absolutely rediculous and ignorant
engine wear depends on so many different things, the idea of making a blanket statement saying "your ls1 has over 100,000 miles, you need to used 15W50 or 20W50" is absolutely rediculous and ignorant
I never told this guy he NEEDS to use 15w20...I said it will work out just fine. And it will. Regardless of his level of wear, at 100,000+, it will work great for him.
15 years of having built engines myself and knowing literally hundreds of people with different set-ups, I think its safe to say what oil works in LSx's.
An LSx engine over 100,000 miles has significant wear, period.
Teching In
Joined: Feb 2008
Posts: 35
Likes: 0
From: Newton, NC
The LS based engine are built with very close tolerances and designed around the lighter oils.
The heavy weight oil is not a good idea.
Even with high miles the wear on bearing and cylinder walls is very minuscule.
By using a heavy oil, your starving parts of the engine from lubrication until the oil is heated.
Your killing it on cold starts!
These engines are not GEN 1 engine built with sloppy clearances.
This is why you see them all the time with 200k plus miles going strong!
Al
The heavy weight oil is not a good idea.
Even with high miles the wear on bearing and cylinder walls is very minuscule.
By using a heavy oil, your starving parts of the engine from lubrication until the oil is heated.
Your killing it on cold starts!
These engines are not GEN 1 engine built with sloppy clearances.
This is why you see them all the time with 200k plus miles going strong!
Al
If you are running stock clearances, give mobil 0w-40 a try. There is no need to run really thick oil on these engines, even with more miles on them. I have seen 100K+mile engines with very little wear on them.
12 Second Club
Joined: Apr 2002
Posts: 680
Likes: 0
From: Cave Creek, AZ- Canada Also.
Its a huge read but well worth.
Keep in mind w is for winter and start up protection. Even in Florida on a stone cold engine you need max protection upon start up and 0Wxx will give you that.
But read the article its very interesting.
http://ferrarichat.com/forum/showthread.php?t=136052
On The Tree
Joined: Jun 2007
Posts: 170
Likes: 0
From: Minnesota!!!
+1 haha! No seriously now, that is way too thick. Try using a FULL synthetic and i promise your engine will be happier and your wear will be reduced. I hear alot of ppl using mobil 1 and its ok but i use AMSOIL and that is honestly the best stuff out there. Give it a try. But deff go with a lighter oil. That is just way to thick.
