MickVette

**UPDATE**
The Mobile 1 M1-113 filter was not the source of the leak (The side main bolt above the oil filter was loose and leaking)
**UPDATE**

The Mobil 1 M1-113 oil filter started leaking sometime during the 1/2 mile event and on the two hour drive home. My GF was following me mentioned that white puffs of smoke would randomly come from under the car on the way back. When I finally got a chance to inspect where the oil leak was coming from, I thought the filter might have worked its way loose but that was not the case, I found the seam around the top where the can meets the flat part that holds the seal is leaking. Does anyone have another recommendation for performance oil filters?

Bill Dearborn

You may not need to change oil filter brands. Just changing to a different brand doesn't mean you will get a different casing. They may all buy their casings from the same manufacturer. It may be a rare defect. I have seen and heard of many different brands that have had issues.

Bill

User Omega

You need ACDELCO filter: UPF48R
GM part number: 12626224

This filter is specifically designed for higher sustained oil pressures in the Z06 and ZR1. It has a thicker casing to prevent this type of leak. Several cases of PF48 filters leaking in hard driven cars led GM to change the specified filter to the 48r in the user manuals as of 2009.

That being said I cannot recall anyone having as issue with an M1-113 leaking. Could have been a manufacturing defect. You could always buy the spec filter and just not worry about it anymore.

MickVette

Thanks for the great info guys. Might have been a defective one. I think I'll switch to the ACDELCO one anyway.

That 1/2 mile racing was a little rough on the car. Lost a B1S1 O2 sensor as well. P0030 and P0053, Heater Control Circuit and Heater Resistance. I pulled the sensor and the heater element is open. I'll get one of those on order as well.

Also lost voltage to the Front camera that was connected to the 12VDC accessory under the radio during one of the passes. Might have to cut this cars racing career short.

80atez

Just be sure it is indeed the filter. Make sure it's not an engine bolt, such as the side main bearing bolts. Mine was loose and looked like a filter leak.

1/2 mile is hard on a car, but should not effect a good filter. I've road-tracked mine for probably over a thousand miles with M1 filters, never a leak. But stuff happens at 7K RPM.

I've lost the rear diff speed sensor in mine, so that only at over 100mph, the gauges went to zero! That will get your attention.

MickVette

Thank you. That was good info and worth a second very careful look. Last night I cleaned the entire area with brake cleaner and wiped every moist area dry so no oil residue anywhere near the filter. Today I checked everything again especially any bolts near the oil filter area. I have one single tiny stream of oil that looks like it originates at the seam of the filter. The replacement filter shows up Wed so I will verify everything again at that time...and keep an eye on it!

American Heritage

We stopped selling the M1 113 filters and started selling the ultra high end Wix filters. We had quite a few issues with the M1 113 filters leaking. No issues so far with the Wix filters.

http://www.americanheritageperformance.com/

MickVette

I see the Wix 57060XP but nothing under their Racing Filter line up with the LS7 thread size..

Dan_the_C5_Man

Always known WIX made good stuff - Can you provide the P/N?

RedZ4me

^^^

57060xp

Millenium Z06

AC is made by the same people who make M1, Champion Labs. I've never had an M1 leak anywhere. I have a high volume pump making 55lbs min pressure

ETA, mine did fine in the TX WGF event

80atez

Yeah, I think M1 and wix are both good. I think M1 markets theirs as HD casing, iirc.. But it's good to know some have failed, may make me switch.
Never heard badness about a wix.
Any $10 disposable part can fail now and then.

Thanks all.

Millenium Z06

Absolutely, they're not much difference in price

REDZED2

Last summer after my only autocross my K&N HP-1017 which is the same (inside) as the M1 113 starting dripping down the sides lightly and some blow back. Nothing really bad but still noticeable. I snugged it up a 1/4 turn and it stopped. It did seem a bit loose and I have done a 100 oil changes. Ran it hard after tightening it for 20 minutes and no more leak. Your issue could could be different. Hard to tell. The M1 should never leak if its snugged properly. High PSI pump or not.

MickVette

I did check to see if it was loose but it was tight. I finally got the rear facing camera videos and could see white smoke that seemed to coincide around the higher shifting 7100-7300rpms.

https://www.youtube.com/watch?v=7LjlnSRpH9A

80atez

If I'm not mistaken my Z is the only car I've owned that has a torque number for the filter. I think it's 25 or 28ftlbs?? I've always used that spec with my trusty Armstrong wrench and never had one loosen. "wet" of course.

As a wanna be mechanic / engineer, I appreciate numbers to make me less likely to FU...

MickVette

My apologies to Mobile 1. It is not the filter.

I can't find the source of the leak, but it is definitely not the filter. There is oil seeping very slowly from the rear corner of the block right above the filter. I put a 1/2 turn on the oil pan bolt in the corner but that didn't slow the leak. It could be the seal block with the two lines that bolt right there but those two bolts were tight. I'm not sure if there is a main bolt above there or or anything else that could leak.

American Heritage

The smaller main cap bolts are right above there. They have rvt on them or else they leak If one comes loose they leak (should not come loose though). I would look at those to be sure its not coming from there.
Also could be leaking from the RVT at the rear of the block where it meets the pan gasket (common place for an LS to leak).
The Wix filter is 57060xp (as mentioned above).

http://www.americanheritageperformance.com/
310-326-2399

MickVette

Thank you guys so much. I would have been chasing my tail on this one. The side main bolt was on its way out. Still have to de-grease the area, seal the bolt, reinstall then retest once the RTV cures. Even looking directly at the bolt with a light and mirror it still did not look like the source of the leak until I put a socket on it and there was no tension on the bolt at all.

REDZED2

Nice you found the source! I had a feeling it wasn't the oil filter. For the last 30 years I have never used a tq reading for any oil filter. I always do the usual 1 full turn after the filter gasket makes contact and have never had a leak. Last summer I misread my turn mark on the filter. Good find with the camera!