100 dhs to anyone on carnity who can find an engine I built that was bad, rattles, grenaded itself, whatever.
I work to the book, I don’t bodge things, scam people, make misdiagnoses, charge for work that didn’t need to be done unlike many mechanics in uae, no names dropped.
I’d also like to throw this out there, Black engine oil doesn’t necessarily mean it’s cleaning the engine. A well maintained engine shouldn’t be so full of contaminants that it turns the oil black over 1,000 km or less. More often than not, it’s cheap, crappy low grade oil which turns black because it can’t handle the heat and burns and breaks down, thus not protecting the engine. There’s a little thing in chemistry called oxidisation, maybe worth reading up on. Then there’s also the issues of whatever additives are in the oil which will also break down and turn dark over time.
If the oil is black instead of dark brown come service time, there’s a good chance the wrong oil was put in, ie not to manufacturer specs. Failing that, maybe it’s time to take a look at your rings and bores.