I believe my 95 Indy 500 efi is using too much oil. After idling in one spot for a few minutes there is a film of oil under the exhaust that you can drag a finger through and write your name. This seems to be more that my friends 2000 MXZ 600 and 88 Phazer. Also the plugs are black and wet with oil in the threads and on the tips. The sled ran great all day yesterday but I did use more oil than my friends. My questions are: is this condition bad if there is no performance drawbacks and how can it be corrected? Thanks for any help.