I'm not one to talk "junk" on the internet, but your first response
was absolutely retarded. If you put 15w40 or heavier viscocity oil in
your honda you will put extremely excessive wear on your crank case,
and possibly destroy your engine. It will also hurt your gas
mileage. Plus Deisel oil is made for deisel fuel. Its just not made
to stand up with all the detergents and additives that are put into
gasoline. I own two oil change facilities and one all around repair
shop and it is my life. As far as which oil is best. If you look-up
any test by the API(american petroleum Instite) it will normally
conclude that Amsoil Synthetic is the best. In a 2.0 Honda motor with
less than 100,000 miles it is probably recommended that you use a 5w30
maybe as heavy as a 10w30. Any name brand oil that is certified by
the API will work, but synthetics are superior, and AMsoil beats all
others(including Mobil 1) in most test. With a synthetic, oil
additives are not necessary. However many have been proven to help
reduce friction(I sell TX7 at my shop). One of my vehcles is a 95'
accord(my daily driver) with the H22A vtec. Its had an Intake,
header, and exhaust. I dog it and have 200,000 on it and it runs
perfectly. As far as your reving goes. I don't know off hand what
the redline is for that specific block, but it is no problem to barely
hit the redline somewhat often in a honda motor. Check on a honda
message board(such as ) to find out your specific
redline. The s2000 doesn't even redline till 8500. They make tight
small motors with a short stroke so it can be reved. You don't wwant
to go far past your peak horsepower, but the farther you go the father
you are into your torque band when you shift to the next gear.
Thankyou for your time.