Some engines sludge up no matter how often the oil is changed, e.g. Toyota engines (among others) are notorious for it. Honda engines aren't, at least they seem not to be and I've never heard of it being a chronic problem.
seen a good few older bmw engines with this issue too.
whoops back on topic use honda FEO and chane it with new stuff every 5000ks
Originally Posted by JohnL
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