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Originally Posted By: Gokhan Originally Posted By: KrisZ Also, since most cars are manual, they are revved higher between gear changes even at slow speeds. High RPMs actually require thinner oil than low RPMs. Read the reference I posted above. In the hydrodynamic-lubrication regime, the...

I'd lean toward shortened intervals, using relatively inexpensive oil. HDEO are cheap and clean well. Change every few thousand miles, or when the oil gets good and black.

My last batch of M1 was 10-30HM; I ran it with a Pure One filter for ~10K. My Honda is notoriously 'easy' on oil, and I've seen enough UOA to know that the TBN, etc. will be fine. The slow rate at which the oil darkens suggests that insoluble particles, etc. will not be an issue either. This...

What type of big end damage? Give this (or a similar site) a look. http://www.tribology.co.uk/services/investigate/pb01-0.htm Increased pump pressure does not directly affect oil wedge thickness. Better flow can reduce bearing temperature and, obviously, improve the volume of oil available and...

Oh dear, your oil mist plate on the cover is SLUDGED beyond repair! I think it's time to scrap the engine!

Originally Posted By: Ken2 The design of the engine is another critical factor. A larger bearing surface with the same load will have fewer pounds per square inch of force on the oil film, so a lighter viscosity can be used, and vice versa. Other things remaining equal, higher viscosity gives a...

Originally Posted By: volk06 Wouldn't you want a oil with a higher HTHS for a mod engine that is pushing out a significant amount of more power? YES! The Stribeck curve is real! Increased bearing loads strongly suggest an increase in HTHS to maintain the 'standard' oil film thickness.

I'm a big fan of the Stribeck Curve. In light of the modestly increased crank and small-end bearing loads, I'd aim for an increase in HTHS to 3.5 or higher. Try GC, one of several flavors of M1 (10-30/40HM, 0-40, TD), or a similar 'thick' oil. A quality dino 15w-40 would work in a pinch too.

Originally Posted By: Quattro Pete As was noted in the past, this tools in not very reliable for very low ambient temps (say 32F and below). Using just two data points (Visc at 40C and at 100C) cannot account for different oil chemistries and things like pour point depressants that may be...

Originally Posted By: aquariuscsm Could be just the nature of that particular engine too. +1 If the OP wants to stick with M1, try 0W-40 or 10w-30/40HM. Both have a 40c (close to start-up) viscosity not quite half of 15w-50m, yet also retain decent HTHS values. This may help the start-up...

Originally Posted By: Pajamarama Hello all -- My car: 1997 Honda Accord EX Wagon with auto trans. I purchased it 2 months ago. Bought it with 165k miles on it -- now has 167,500. It didn't come with maintenance records so I do not know much about its past. The first thing I did when I got it...

Originally Posted By: Bambam My daughter has a 2000 MB ML320, which they purchased used with 60k on it. Mobil 1 0w40 is the preferred oil of choice and thats what it got last oil change ( that I paid for). Well it's been 10k miles and it's time for an oil change, that they can't afford and...

It might cost you a fraction of a MPG. Not even the crazy hypermiler people worry about oil viscosity.

Sometime back in the 90's I managed to destroy fresh Castrol 20-50 GTX while riding my air-cooled GPz across the Mojave desert. It was July and temps were around 115, with occasional hot spots that must have been 5+ degrees hotter. (Just when I thought I'd acclimated to the blast furnace...

4 quarts of Motor Honey will quiet that sucker down!

Drain and reuse! (Or just leave it in place and live with the thought of leaving a cup of dirty oil in the engine.) Hey, 10 bucks is 10 bucks! Unless your car is deathly ill and is shedding particles into the oil, the filter will not even notice 5K miles.

The Fram shirt gave me an idea... Has anyone ever dressed their kid up for Halloween as an Orange Can of Death? (Or maybe a bottle of oil, or something else BITOG related?)

Fusion has become a perpetual carrot-and-stick proposition. If I ran the Zoo I'd quit chasing it and concentrate on perfecting proven technologies. I'm pleasantly surprised at the number of folks who even know what a Thorium-Salt reactor is! Go Kirk! If only we'd had the willpower to spent a...

I don't mind Jen but #1 is a heck of a reach. (Paris Hilton made #46, and Brittany Spears broke into the top 5, so it's obvious the judges were high on something!) Regarding Aniston, I can't fathom why she picks the roles she's played lately. It's just one sub-lowbrow film after another. Why...

Originally Posted By: LeakySeals Oil consumption, sludge, valve seal startup smoke, weeping oil pan gasket, bad startup tick. Mobil website data sheet states "extra" wear and cleaning additives, a good oil for severe service which this cars life consists of. Main reason I wanted to continue use...