There is good maintenance that should be performed on engines. Changing plugs, wires, throttle bore cleaning, air induction service, fuel injector service, air filter, pcv replacement etc. I do not believe in oil flushing. If you change your oil regularly at 3000 miles or 3 months, you should have no need to flush. If the oil is getting dark too quick, then change it more often. Putting things where they don't belong causes trouble...Ask Micheal Jackson. 77,000 miles is not a lot of miles on an engine these days, if it is properly maintained. If you have a voice telling you to do something nice for your engine and just can't control it, then switch to mobil 1 synthetic oil, but don't switch back and forth.
First buy a can of flush to put in your engine oil. then run your engine for a few days to get hot and breakdown the sludge and varnish inside the engine. Change the engine oil while it is hot and refill with good quality oil. I always use castrol synthetic as a personal preference.
I wouldn't recommend it. Vegetable cooking oil is for cooking not for lubrication.
The engine dipstick is the only tool you can use to measure how much oil is in the engine.
in austrailia hot enviro and temp , use 20w50 sl and 300 ml moly engine oil treatment, flush old engine oil first for 15 minutes.
Engine sludge formation includes, lack of proper maintenance, inappropriate oil temperature, use of an inferior engine oil, and engine oil contamination. You can try flushing it out with an oil flush additive but often times this does more harm than good.
You will not damage the engine but you can damage the radiator if you use any high pressure. If you only flush and apply no pressure you will do no damage. Use a chemical flush and a water hose and you will be safe.
No you can not use gas engine oil in diesel engine oil because processing of diesel engine is different from gas engine oil. If you use this then it damage your vehicles.
Depends on how worn the engine is. An engine in good condition won't hardly use any oil at all, maybe a cup or so, while there's virtually no limit to how much oil a worn engine can consume.
It can cause engine damage.
the engine oil to use is 5-w20
Yes, use exactly what the manufacture recommends in the engine and gearbox. gearbox oil is normally a much heavier weight of oil.
I wouldn't do that because, although it may well dissolve a lot of the impurities it's not nearly as good a lubricant as the oil and the bearings would not like it. You'd be better not to use anything. What gain do you think you are going to get from flushing? I called advance auto parts and auto zone. Both persons I spoke with said diesel fuel to flush engine works better than any engine flush they have. Just idle for 5-10 minutes. Don't drive it though until after oil change.