If guess normal wear. Thick black but no thicker than my throttle body was.besides the seacrap and lucastrash, good advice.
however, i think the more important thing here is being missed. you say that the cylinders are 'full of gunk'. i'd love some more info here. are we talking about the typical thin layer of carbon buildup or are we talking about thick sticky burned oil buildup? obviously, trying to determine if there is an excess of oil getting into the cyldiners. what did the old plugs look like?
if its just a bit of carbon, don't worry yourself. this is perfectly normal for any engine and as long as the engine is running correctly it should never present a problem. unless there is excessive buildup (usually due to a problem, fix that first) the only surfaces that are going to have a huge impact are the cylinder walls and the sealing surfaces of the valves. it takes a LONG time and many many miles on the engine to create that kind of problem by normal wear and tear. by the time you get there (again, under normal circumstances) you've got bigger problems to worry about...such as the engine is completely worn out anyways.
Yes/no?If guess normal wear. Thick black but no thicker than my throttle body was.
Would you recommend full synthetic from now on? I've never had it done on this vehicle and heard it can clean it so well that it will remove dirt that could be plugging seals and cause leaks. ???
i would actually recommend NOT using premium all the time. there is simply no need for that. in fact, i never use it. i suggested that as it has a higher concentration of detergents and usually no ethanol (that depends on where you live and where you get your fuel).I don't mind using the premium gas, in fact not only was I planing on doing so regularly but I've already started on the last fill up.
i said nothing of the sort. if you want to toss synthetic in, go right ahead.What are you saying using a better grade oil isn't applicable in an older high mileage vehicle? Can I not get a full synthetic oil change from now on?
yes the age old debate...nobody seems to know for sure. i have read that old synthetics were bad for this and its not such an issue now...never been able to track down an answer.You can switch to synthetic at any mileage. Some will argue that synthetic will remove internal sludge that leads to engine leaks....