Frank Matthews wrote:
>
> Hi,
>
> yesterday 'cause I have to go through inspection I changed plugs, pcv,
> and oxygen sensor, and added a quart of oil... 10w-40 (usually calls for
> 10w-30)... drove it out to mom's... fine... on the way home the
> "service" light comes on... all the connections seem good and it seems
> to run fine... is this just the result of the 10w-40 bumping up the oil
> pressure a bit and I should just change back to 10w-30 immediately? or
> more serious?

The oil was not the casue. Mosty likely one of the other
item you changes was the casue. I'd guess spark plugs. What
type of car? Did you use the OE plugs, or decide to switch
brands or types? If the service light was not on, why did
you think you needed to do anything to pass inspection?

Ed