rbl

I usually run 1/2 to 1 qt. over full for HPDE in the C6. Is 1.5 Qt. over too much and what are the consequences if any? I inadvertently overfilled (with the aid of my helper ...lol) it a little!

Any issues with seals?

Wayne O

I'm no expert but I think 1.5 quarts over is too much. When I track my car I put about an extra half quart in. Someone told me even using a full quart over can cause some oil 'ingestion' problems. If it were me, I'd drain some oil out.

AU N EGL

Rex

The GM engineers recommend for the C6 that no additional Oil be added for HPDEs or track events.

One 1 qt extra for C5s

drbenne

1.5 qts over is too much. Not sure if it will cause any harm, but it will blow thru your PCV and you get oil all over your throttle body/intake etc. as wll as out the exhaust and over the back of your car. It is a huge mess.

rbl

OK ... thanks folks. I thought so too. Will drain it and run it at the full line.

Rob Burgoon

Huh... I thought it was 1 quart over for the base and Z51 C6. I have been wrong before though...

MattW_VA

Owners manual states add an additional quart. (in 2005 anyway)

VetteDrmr

Tom, sure that's not for C6Z06s with dry sump? I think LS-2/3 are supposed to run 1 qt over.

Have a good one,
Mike

rbl

It was 1 1/2 qts over.

I took 3/4 qt. out so it is 3/4 qt over full ... that is about where I have always run it.

sothpaw2

How do you tell exactly? I can only tell by draining for an oil change and then assuming that I got virtually everything out with the change. The C5 is a 6qt capacity so I add 6.5. Above the full line it's really hard to tell what's going on.

AU N EGL

Direct from the Corvette man who is in charge of all Corvette Warranties. Plus the Chief LS# engineer. No extra oil for any C6s.

Helps when these guys come to our NCM HPDEs.

C5 XTC

That question was asked at the first drivers meeting at Road America and as Tom says, the "man" responsible for all Corvette warranties responded that no extra oil should be added to the C6. Unless someone knows of a better source??????? It IS great to have the GM folks at the NCM events for questions like this one and all the others we ask them.

C5 XTC

rbl

About all you can do is know what you put back in and then get a reference on the dipstick at that level.

When I have the filter off I also crank the car and run it for ~ 10 seconds. That gets a lot more oil out from the filter area and seems to work. I have a Z51 so there is still some in the cooler.

Headed to VIR now so we wil see if it works I guess ..lol. RAIN .. rats.

jcmbird

Friend just blew a rod in 91 zr1 motor with too much oil be careful.

throwit

Funny that the "man" would say something contradictory to the Owner's Manual Guess its believe what you hear, not whats typed in your owners manual (of all places).

The LS6, LS2, LS3 are not much different at all in engine design or lubrication. I do not see why for the LS6 it would be required and not for the LS2/3? Doesnt make much sense to me...can someone provide a better reason besides the "man" said so...??

VetteDrmr

Depends on who the "man" is, and who's forwarding the info. BTW, you *never* run your car with anything but runflats, right?

Great info, Tom, I'll forward that on to my C6 buddies!

Have a good one,
Mike

thehammer69

You are of the same thinking as me. IMHO, if I owned a C6, I would run extra oil.

throwit

You let the "man" sway you?? You earlier said you thought they needed it???

Fortunately I don't go off of "word of mouth" without associated reason or logic, especially 3rd hand from someone called the "man"

If you, the "man", or anyone else would like to explain what is special/unique about the LS2/LS3 which would require them to NOT use an extra quart while the LS1/LS6 would, then please feel free to to do so...

I dont even own a C6, I am just curious about the justification behind the statement.

VetteDrmr

Most small blocks usually run 0.5 - 1 qts over for track events. I knew that the owner's manual recommends that for LS-2/3 engines. I also know that there are people that have a lot more information/knowledge than I do, so I stand corrected on my previous statement.

So, if that "man" was, say, Lou Gigliotti, or Roger Penske, or *the* LSx design engineer from GM, would you believe them? I would!

Have a good one,
Mike

throwit

If Lou G or Roger Penske said something, I AM 110% SURE they would have a supporting explanation/argument (as Lou G has done NUMEROUS times when advocating his products, and GIVING REASONS as to why they are designed a certain way, better than others, etc).

So what if Lou G said one thing and Roger said another? Who do you believe? Wouldnt it be wise on your behalf to find out the REASONS why they felt the way they did? and make an EDUCATED decision? or maybe you would have Lou and Roger play rock, paper, scissor? LOL...becasue after all reasons dont matter right? just that the "man" said it!! LOL

In general, if/when anything is in question, and an answer is given, wouldn't you want to know why?

Its not as if the answer is consistent, there are conflicting answers for basically the same engines...doesnt that make you a little curious?

To each his own, but NO, I would not take someone's "word", no matter who they were, if they had no reasoning behind their statement, ESPECIALLY if that statement was contradicting another, and furthermore if that statement was heard 3rd hand.

If "cause he said so" is good enough for you, than more power to you ...different strokes for different folks.

throw it