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I help my neighbors with basic maintenance on their van, a 2003 GMC Safari 4.3L. The diff has never been serviced at 120,000 miles but I don't want any liability issues/angry neighbors if doing the diff service this late can cause problems. It isn't making any noises and seems to run fine, and...

Ran this for 7000 miles on Mobil 1 5w30, did an oil drain only, filled with frankenbrew and went another 5000 miles. Looks good IMO although I don't plan to run oversize filters quite this long lol. ADBV was still nice and pliable, base gasket still fairly soft. At the bottom of the can are...

This was taken off a 2003 GMC Safari van with the 4.3L V6, 110k odometer miles. It belongs to my neighbors and is not well cared for, mostly city driving and short trips but seems to run OK. The oil drain was very small and very overdue... the sediment at the bottom of the can is a reflection of...

This is a 1980s-era motorcycle from Honda. 2-stroke, 50cc air cooled engine, 5-speed transmission *with full clutch*, mag wheels (no spokes), sleek design and super cool. I am really surprised that this model did not take off better than it did, or continue the design (by Honda or any other...

Watching a youtube video on various fuel injection systems, I see the screenshot below. Is this correct? Most modern port-injection systems pulse twice per cycle? I always thought computer controlled port injection systems were smart enough to inject fuel *only* at the intake stroke.

I was on a first date the other night. I'm 12 years sober and she wants a Sierra Nevada before dinner. This is absolutely no problem, I've been in bars and parties and other stuff before without any wavering whatsoever. I walk up to the bar and order a Sierra Nevada and a Cherry Coke. As pull...

Odometer reads 165k miles. The first 120k miles were on conventional 5w30 at 5k intervals: Chevron Supreme, PYB, Castrol GTX. The next 45k were on synthetic 5w30 at 7-8k intervals, mostly M1 vanilla. Used standard oil filters such as WIX, Denso, Motorcraft, etc. Did this job because the valve...

T4 is 15w40 "conventional" and T6 is 5w40 synthetic. I've been using T4 for a while without any problems except hard starting at lower ambient temps. I've used T6 before and the starts are good but shifts are quite notchy. My idea is to blend T4 and T6 50/50 to get a 10w40 that is really stout...

If this has been discussed before, please post a link to the thread(s) and close this one. Searched but did not find. I understand the concept of the cylinder being lined with a very thin layer of oil, which is partially burned off during the combustion process and the oil is replaced on the...

I understand what each means but I don't understand the mathematical equation that all the engineers use: HP = (TQ x RPM)/5252 How could this equation be true for every engine? There are SO MANY different engine designs: different bore x stroke, different compression ratios, 2 large valves vs...

My Corvette has had a power steering leak for a long time, not much, just a couple drips a week. Never needed to top off fluid but just knowing it's leaking bothers me a little. The pressure hose is fresh and I know the hose fittings are not leaking, but still I can't see exactly where it's...

Do most modern engines pump oil through the crank & con rods to the wrist pins in order to lubricate the cylinder walls? Has this become the standard method for piston/cylinder lubrication? Maybe it would be easier to list those designs still using splash or squirters? Thanks.

The photos show an o-ring at the primary joint between the head and body of one of my torque wrenches. The wrench works fine but I am curious as to the purpose and proper positioning of this seal. Right now it's not really doing anything, but I assume its purpose is to seal something? Seems that...

I heard about this system a few years ago but have heard nothing since. Web searches only produce old results. Anyone have any info? Seems like a great idea that never took off, and don't see any new vehicles using this system. See LINK and VIDEO.

A couple years ago I read an interesting story about Castrol developing a new type of oil change service where the new oil and filter are contained in a cartridge-style container. When the oil needs to be changed, the old oil and filter are pulled out together, contained in the old cartridge...