Ls1 excessive oil consumption?

[vr304]

Hi guys I have a 2001 vx ss 6 speed manual with 116,000 ks on the clock and it seems to be chewing thru the oil, any ideas what could be causing it?

 

[Grennan]

Its not uncommon for LS1s, especially the earlier ones to consume a lot of oil.

Is it blowing smoke? Piston rings worn and its burning oil perhaps. Have you got a catch can - could be a lot of blowby in the manifold. Noticed any leaks? Checked the rear main seal? These are fairly common to go as well.

 

[commodore665]

as above it was a common problem with the LS1 engine to use oil , even from new they were oil eaters , as Grennan says check the obvious things first .

 

[corhijasna]

first thing to do as mentioned before is to check for oil leaks,if none are found then run the car for a while and remove oil cap and check for plumes of smoke then check exhaust for a bluey coloured smoke,if these are ok then you probably have the wrong grade of oil in the car,10-30 or 10 40 is what you should use at a minimum imo

 

[vr304]

first thing to do as mentioned before is to check for oil leaks,if none are found then run the car for a while and remove oil cap and check for plumes of smoke then check exhaust for a bluey coloured smoke,if these are ok then you probably have the wrong grade of oil in the car,10-30 or 10 40 is what you should use at a minimum imo

Remove oil cap with engine still running? If I do see plumes of smoke what does that indicate? I am running Penrite hpr 10 oil so shouldn't be the problem

 

[Grennan]

Will let you know if oil is burning.

If it is burning, it means theres an issue with your piston rings. Thicker oil MIGHT help slow it down but its a temporary band aid.

As I said, even new, they were oil guzzlers. A lot were replaced under warranty.

 

[Immortality]

More of a problem too with the manual cars if the drivers like to use the gears to brake the car which of course is normal with a manual box.

 

[vr304]

So if I gave it a compression test what sort of numbers should I be seeing?

 

[Drewie]

So if I gave it a compression test what sort of numbers should I be seeing?

Just had a look in my LS1 workshop manual and all it says is:
Minimum compression reading should be not less than 690 kpa.
Variation between cylinders: The lowest reading should be not less than 70% of the highest reading.

 

[gmwarrior]

More of a problem too with the manual cars if the drivers like to use the gears to brake the car which of course is normal with a manual box.

Hey mate just wondering, why is that more blow by being created when engine breaking??