why does the oil i changed smell like a solvent or gasoline?

Is it fuel injected? If so could be a faulty fuel injector. Letting fuel by while engine is off.

yes it is fuel injected...thank u for your input.i take it that this is a problem. is changing a fuel injector somewhat easy and what is the best way to go about confirming this a the problem?

inspect each sparkplug for excessive fuel is one way. one or more injector(s) could be stuck open.

i just did a minor tune up a few days ago...plugs and wires, they looked good, fuel filter, air filter, oil and filter... but i will take a second look at the plugs. thank u very much i will be back given the plugs check out ok.

Best to let it sit for a while. Maybe over night then pull the plugs out to inspect. Do not start car before you check them cause that will cause the extra fuel to burn off and you won't be able to tell if the injectors are leaking. If they are wet with fuel then it's injector is stuck open. They should be good and dry.

What ever it is, be CAREFUL!!! Fuel in the oil can cause a fire in the crankcase, and that is guaranteed to kill the engine, and it can be extremely dangerous.