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Yeah I'm not sure the differences for monitoring your engine. I was always told if the DAM ever drops below 1.0, get rid of that gas. I thought Mobil was top tier, but it still could be a bad tank. Typically when I see the knock learn it is at a pretty specific RPM, I don't always notice but...

Almost seems like bad gas. I've never seem my DAM drop below 1.0, ever. Have you noticed less than 1.0 before? Did you use a different station than normal or a non top-tier station?

Originally Posted by Snagglefoot If you want to try Rotella T6 0w40 , it is CJ-4 SN. Interesting, I didn't realize the 0w40 is still CJ-4 SN, I wonder why as all the other viscosities went to CK-4.

Okay thanks, I was thinking of seeing if I have room for an oversize filter, XG3600 came to mind with 12 psi bypass.

Would there be any adverse effect to running an oil filter with a bypass on an engine that has an internal bypass? Does anyone know if GM publishes the internal bypass PSI spec for their engines? I'm not able to find anything.

Yeah that's what I'm used to seeing ^^ I cant find any information stating that the bypass is in the engine, but all sites are showing these as the correct filter with no bypass. Engine is the LX9 3500 V6 if I recall.

Originally Posted by danez_yoda http://www.fram.com/parts-search/TG3387A This one has no bypass. If that is what is called out for your car, the bypass is in the engine so the filter should not have one. Okay I will double check that. I just went by the Fram filter finder tablet at the store.

10,000 kms on a 2007 Buick Rendezvous with PP 0W30. Replaced with a Mobil1 filter and Valvoline Syn 5w30. This is the first OCI I've done since acquiring the vehicle, 106k kms on the vehicle. First time cutting open a Tough Gaurd, most filters have a spring attached to the metal peice for...

Hah I suppose by definition. Just doesnt seem fitting for "high speed" applications.

IIRC a lot of the ringland failures are attributed to high load / low rpm scenarios (WOT in too high of a gear at too low RPMs). Not nessicarily low speed preignition just insane pressure build up. A lot of times it was flooring it in 6th gear to pass on the highway without realizing (paying...

Originally Posted by BMWTurboDzl OP: Please don't take this the wrong way but you are wasting your $$ on UOA's. With the ridiculously low interval even a conventional 5w30 will appear to be fine and as a result you simply cannot draw any conclusions. It helps me sleep better at night knowing...

No I have a cobb downpipe then catback exhaust, cat still intact. Yes I used the same additive with a different oil.

Originally Posted by edyvw What is point of using additives? The first two oil samples showed uncharacteristically high iron wear numbers. I had never seen a UOA for this engine with iron in the double digits before, not even on much longer OCIs. This is using 40wt synthetics as well. I asked...

All the samples are similar intervals (annual oil changes) and other additives were used in in the past (note the moly in the rotella).

This is the third analysis on this car. Things are looking up! First oil was Motul Xcess 5w40, second was Rotella T6 5w40, this report is Mobil1 Euro 0w40 (with 5 oz of Hyperlube Zinc Replacement), filled it with GC 0w40 (with the rest of the Hyperlube ~7oz). Remaining in my stash I have one...

Yeah the cost isn't huge over the course of time. I just wish there were options out there. I can get the best oil filter on the planet for ~$10 (Fram Ultra). Why does an average filter/magnet cost $37.50? Just because no one else makes an inline transmission fluid filter. Why pay more than you...

I currently run a Magnefine filter on my Echo and Rendezvous. In Canada the only price I can get them at is $37.50 CAD on amazon.ca. I did find some Chinese replicas on ebay.ca for ~$16 CAD. Here are some side by side pics, they are nearly identical. The proof is in the pudding though, I will...

Petro Canada Ultra 94. Sometime in the new year I am planning on having a flex fuel conversion kit installed and hope to run E85 in the summer the Ultra 94 in the winter. Currently running some Cobb bolt ons with an off the shelf map. The flex fuel kit includes all injectors, pump, rails...

First time running a magnetic drain plug too, theres the iron...

Kind of getting boring, I've posted one of these 3 years running at my annual oil change. Low kms and nothing to report. Out came Mobil1 0w40 Euro and in went Castrol 0w40 Euro with another Subaru filter. Now that I have used up all my Subaru filters I may try a XG7317 next time. I will send the...