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If a failing conrod or main bearing, camshaft wear, etc., is causing engine knock (understanding knock can be multi-causal and mis-diagnosed), will metals always be elevated in the UOA if it's been going on for a couple thousand miles/km? If just a single UOA is used, vs trend-analysis, would...

Even with regular coolant changes, is it normalish for an older (+15 yrs) iron block to have some moderate rust & scale inside the cooling channels? I thought it better to post here, vs Cooling System Fluids & Additives, as thought there'd be some head gasket replacement and/or engine...

I posted a query here and appreciated the good input. With wheel bearings usually using NLGI #2, afaik, would the tiny roller bearings do better with NLGI #1.5, for pumpability's sake? The originally spec'd Mobil GS57C is NLA: I haven't been able to get its specs.

aka inner tripod bearings. Bentley recommends NLA Mobil GS57C, distinguishing between it and a different grease for the outer CVs. Would Redline CV-2 or Mobil 1 Synthetic be okay or? Amsoil recommendations...

Relates to http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=24;t=003761 OCI and oil type unknown. 4 cyl 2.0L turbo 110K miles. Rough range guesses on how many miles this engine might be drivable? The high (29-35) mpg seems a bit surprising? Also possibly a HG problem. Thank...

A long-time friend just bought a 91 Saab 900 turbo, 110K mi, dino oil, manual trans. Rear engine seal leak noted, but initially not in magnitude. Leak volume variable, but on highway drive-back after purchase, 1 qt loss / 200 miles, while pulling (not-yet-replicated/verified) 29-35 MPG. Engine...

I spoke to a mech today, who stated that while water, slowly trickled into the intake manifold at medium-fast idle, does a great steam cleaning job on carbon deposits in the combustion chamber area, it doesn't do well on the backside of intake valves This didn't quite make sense to me, as the...

Has anyone ever seen Chevron Delo or Pennzoil Long-Life in 10W-30, in the US, at such places as Walmart, Autozone, PepBoys, etc. Maybe in the north? All's I see in the south is 15W-40. Thanks

Hope this is an okay section to post this to. I've got a couple of manual tranny import cars that both use, what I believe to be mildly splined Delrin balls, in the shift linkage. It could be another kind of plastic or nylon. Delrin, I think, is supposed to be self-lubricating. Yet I always...

Many believe that the bulk of engine wear occurs at startup. Here's a link that suggests it's due combustion byproducts/acid, rather than metal-to-metal contact http://www.fernblatt.com/longhurst/additives.html Does this have merit? If not - if it's more metal-to-metal contact causing the...

I don't know if all GL-4 specifically calls for non-reactive S? and/or that reactive S is needed for the higher EP in GL-5? (Or if reactive S hasn't been used in any gear lubes for years? is now outdated?) But the crux of my question regards changing manual gearbox oil products, and the...

From what I've been able to track down, Amsoil makes Series 2000 20W-50 Racing Oil, and Series 2000 0W-30 _Motor_ Oil (for Racing...) Is there a Series 2000 10W-30 Racing Oil?

I'm wondering about AW/FM additives in engine oil, wrt manuf that recommend either engine oil or gear oil, for their manual trannies or transaxles I drive an older Saab 900, with the 5spd tranny mounted beneath a longitudinal 4 cyl 16V n/a engine. Tranny recommendations are SAE 10W-30 SF/CC...

Sorry if this is in the archives - I couldn't find it. Saw the Dyson analysis & MolaKule's post. Also did a google search using the inventors name. Where can LC & FP be bought?

Anyone have any experience/heard anything about this oil? My interest comes from SNIP I've heard somewhat mixed opinions wrt to how well Falex Wear ASTM D-2670 and the TFOUT oxidation test ASTM D-4742 relate to engine wear Here are some specs, a bit dated (Apr 2002) Heavy-duty engine oil...