Originally Posted by Jrfish007

2. Using a heavier oil will also rob you of power. In the engine oil pan, the crank hit your oil and splashes it up on to the cylinder walls (no civic's don't have a dry sump oil injection system or any fancy stuff). This means the crank has to go through the oil, you can relate this to waving your hand in air and then putting it in water and doing the same thing, it will be harder to move your hand in the water, right? Now put your hand in the crisco do move it around, it's going to be really hard right? Well the thick the oil becomes, the hard the crank has to push to go through the oil, hence the less power that get to you tires and the worse MPG you get. I know that 5w-20 and 10w-30 don't seem to make a big difference, but remeber 1. that your crank is hitting this oil at 2,000-7,000 time a second and 2. that the properties of oil change the harder you hit it (it called historiesis).

Originally Posted by 02boostlessCIV

i agree with everything except 2000-7000 times a second, rpms revolutions per minute, so if you do the math its 2000-7000/60 so 34-117 times a second

Originally Posted by standalj

I heard that you should wait until your engine has at least 10,000 miles on it before switching to synthetic. Any comments?

Originally Posted by standalj

To those of you who have Honda change ya oil and use synthetic oil, are you simply providing them with the oil and asking them to use it when they do the oil change?

Originally Posted by nitroal1973

Redline 5W20 in mine...