cvtbenhogan

Mixed M1 with Castrol Edge (dino oil) once on an older car. Noticed 3-4 mpg drop. I won't do that again.

dgjks6

You guys convinced me. Went to the store to return the wrong filter and bought another quart of Pennzoil. Got 5 quart deal with a filter of the Castro 5w40 Euro for $35 for the Audi. Now have 7 quarts that match for the Audi and 9 quarts that match for the Porsche

But I feel like I gave into Peer pressure.

phaphaphooey

Not to be an oil snob but from what I have read on BITOG the Castrol 5w-40 is absolute garbage. Both M1 and Castrol 0W-40 are excellent formulations currently and, at least in my neck of the woods, can be had from Walmart in the 5 quart jugs which makes it a no brainer. I happily use either, but, as others have noted, I will only use one or the other so the additive packages do not clash.

Also, with how cheap Mahle/Mann branded filters can be had online, and how much USA parts stores (Autozone/Advance/NAPA/etc) jack up the price on cartridge oil filters such as our cars use, combined with me being chastised on BITOG for using a WIX filter instead of a Mann/Mahle filter, I simply order online a little in advance and always have a filter on hand.

user 72902

Agree and to add to this. The dealer over tightened the drain plug on my Cayenne in January and while not easily noticeable the drain plug cracked. After the service I had a nice size pool of oil on the garage and they offered to tow my car and pay for if it was their mistake. I wasn't too concerned about the money and told them I would top it off and drive it because it didn't want to wait all day for them. They said it was common for the drain plug to split when over torqued.

Bruce In Philly

This is going to be fun: How much digital ink can we spew about the minutia around a single, non-fastening bolt! I will continue......

So here is what is weird, besides our obsessions: I use "standard" crush washers from Pelican with my magnetic drain plug and torque to 19 fl/lbs (per the bolt's spec). If I had my Porsche plug, I would torque to 37 ft/lbs using the exact same washer. The magnetized one never dripped and I did many many oil changes with it. BTW, that is 1.947368..... X the torque force!!! Yeeeeeowwww!!!!

WTF? We NEED to get to the bottom of this issue. How many of us are riding around with an over or undertorqued oil drain plug? I just can't bear to think about it..... the ignorance, the pain, the flaming deaths.... I have to stop now.

Peace
Bruce in Philly

NYC_997

Dear god ... I'm using pelican washer at 37ft lb

Time to sell the car before my engine fails

semicycler

OEM drain plug is 37 ft-lb.
Many magnetic ones are less, including the one Suncoast sells is 19 lb-ft: http://www.suncoastparts.com/product/PKMAGNETIC.html

Many of the problems with the aftermarket magnetic ones are a result of torquing to OEM specs, which is almost double the aftermarket specs. Then the aftermarket plug gets stripped when it's time for an oil change.

Wayne Smith

I'll agree with this 100%. Exactly what happened with my magnetic plug when I converted to 37.

This does indicate that 19 pound feet should seal the crush washer.

dgjks6

Just so you know, I reuse my crush washers and tightened it until I felt it is right. And also, even though I did use all Pennzoil, one of the quarts I had was over a year old before Pennzoil changed to pure plus technology. it still 5w40 euro.

Para82

Am I the only one who changes their oil ever 3-4k miles?

Philster

I change every 3000-4000 thousand miles / Motul Xcess 5w-40

lurchphil

Motul 5w40 and new oil filter every three thousand miles for me. The aluminum crush washers are very soft and can be used more than once. 19# is just fine for the oil cap and oil pan on my 997.2. No leaks at all. BTW, the crush washers for the 6speed transmission are the same as the oil pan crush washers. Don't waste your money on a different part # for the same thing.

dgjks6

3k? I'd be changing my oil every month.

NYC_997

Seems excessive but if it can't hurt at all

Wayne Smith

5 oil changes a year yields me 4 to 5K miles between changes. I buy my filters a half dozen at a time.

Interesting feedback on torque settings.