oils ain't oils?

[Sprocket]

In my last profession of a plant mechanic, I was rebuilding plant engines every other day, albeit two stroke engines for the simple fact the causes of failure always seemed to be insufficient lubrication, or excessive wear due to insufficient air filtration, basically ignoring the oil to fuel mix ratio, and not cleaning the air filters often enough. On completion of the engines, they were started and had the knackers ragged of them under load, allowed to cool and then retuned and started normally and tested again under load, as these machines had to perform when needed,. Interestingly, the motors that were put under load like this always tended to have the report of more power about them than machines rebuilt by other outfits, the way it was described was they just seemed to have an edge, they accelerated faster, and seemed to have a bit more grunt to the engines compared to others.

I was taught this method of rebuilding by an old fart, one of these been everywhere done it all, repair anything bodgers from the past, a guy that knew all the short cuts and was happy to pass on his knowlege before he retired.

The four stroke motors, mainly Honda weren't worth repairing, when they died, they were scrapped, as often if it was found the piston rings were out of tolerance, then the wear was evenly distributed around everything else, the labour costs and time required to strip, clean and inspect were just not worth it, when short engines could be had for less.

I did rebuild a few, simply for the fun of it, and practice with the cylinder hone in attaining the cross hatch pattern, but this operaton was only done on machines we had a lot of, as the time out of service was of little consequence.

But knowing this way of breaking in an engine, I did not do it that way with my rebuilt VW air cooled motor, I followed the manufacturer's instructions to the letter, as I could not afford to replace the motor again, post an explosive incident on a British motorway, ( blew a hole through no.3 piston, set fire to the oil, which then blew the rocker covers off and left a trail of burning oil down the road.)

[slabo]

Anyone here reads enough Chinese to know what kind of oil this is? Synthetic or mineral? full resolution here if you cannot read from photos below.


bought at the gas station for 50rmb.
thanks.

[humanbeing]

This is the cheapest grade Castrol M/c oil that for chinese market.
Next time, look for this guy's (Famous guy in chinese m/c forums |Pirmany school PE teacher that sells oil as hobby) shop

[slabo]

Thanks for the link. I see they sell Synthetic for 70rmb, so what I bought for 50 should be mineral; which is what I want.
Can anyone confirm this?

[andre555]

Hi slabo, on the back of the bottle this API.../JASO... stuff is the classification. --> http://en.wikipedia.org/wiki/Motor_oil

Btw in the "teachers" shop they sell it for half the price: http://item.taobao.com/item.htm?id=1816628367