Changing fully synthetic to mineral oil

[55EXX]

I have for the past year ran a fully ester synthetic 10w-40 oil in my d16a8 with now 260 xxx k's on the clock and with my 20L drums all now empty i am looking at buying a 20 in a mineral oil 20-50 for my ageing engine. i've done a search and found little info about if this will cause any harm.

i remember reading somewhere about how one or the other dissolves buildup in the engine that can be closing certain gaps but in doing so creates a better seal or something in the engine and changing oil disolves that. i think syn oils disolve min oil build up so switching down to min oil should be fine i just want to confirm.

side Q, is 20-50 too thick for a d16a with 260k kms what grade should i be looking at. i know the meaning of the numbers 10w -weight of oil 40 - running viscosity. what's on step up from 10 40. i know there is 15 40 but that is just a heavier oil with the same viscosity.

[aaronng]

10w means that the at -18ºC, the oil viscosity is similar to a 10 SAE weight oil at -18ºC. The "w" signifies that it is suitable for winter use. The 40 means that at 100ºC, the oil viscosity is similar to a 40 weight at 100ºC.

So for your car located in Brissy where it doesn't reach freezing temperatures, the 2nd number is more relevant. I'd use 10w-40, 5w-40 or 0w-40. If you were burning oil, then go for a 10w-50 as a band aid fix.

[55EXX]

sweet 10-40 it is still

[e240]

It will be fine. Probably Cheaper too.
Just ensure you keep to the oil change schedules.

[55EXX]

every 5k oil 10k filter is what i do. this need to be changed?

[aaronng]

That should be fine, seeing that Honda now asks for the oil filter to be changed every 20k with new cars, which is too long in my opinion.