I have not been very good about oil changes on my 2002 Nissan Maxima with 118k. I want to do a complete change and feel that I should use some sort of cleaner prior to adding new oil and filter. I used to hear about using thinner or such into engine and run it before draining however doing this could cause problems with old seals, rings etc. Is there a product out there that is safe and recommended?
Also, Is SLIME, the tire product, any good as a prevent? My daughter’s tires seem to gradually lose pressure over a 2 week period and I thought something to prevent this would be useful.
Thanks in advance, G-Man