Works great. AIRCRAFT Spruce delivered as always.

Robin R Verified Purchase

Challenger Oil Filter Quad Seal Gasket Cp-623

I get about 3-4 oil changes out of these typically. Be sure to lube with oil film and do not over torque.

Chris S Verified Purchase

Challenger Oil Filter Quad Seal Gasket Cp-623

I have these filters on two of my aircraft. One on an IO360 and the other IO540. Works great. I follow the directions of only hand tight and then only 1/4 turn more and have never had leakage problems. If not lubricated properly, again per instructions, it will tear the seal. Excellent product.

Fits and seals.

Curtis L Verified Purchase

Challenger Oil Filter Quad Seal Gasket Cp-623

Bought my oil filter in May of 2019 and it has not leaked a drop. Removal of the filter can aloso be done without spilling a drop. Great design!

The seal is too thin. I had problems with it leaking. I tried just hand tight, it leaked. Then three more tightening settings and it still leaked. Tried a new seal same thing.

The seal is way too thin! You cant tighten it enough to stop leaking. We tried 3 more quad seals, all with the same result... unacceptable seal failure. Wonder if they recently changed manufacturer of the quad seals... ?