Would I save much money on insurance, repairs and fuel if I switched from a Cadillac to a Lexus?

I have a 2005 STS Cadillac fully loaded v8. Id like to switch to a 4 door sedan Lexus thats at least a 2005 year. I pay $815 every 6 months on car insurance right now for owning a Cadillac. I spend about $60 in gas 3 times per week and I dont even drive around much. Repairs and parts are very expensive as... show more I have a 2005 STS Cadillac fully loaded v8.
Id like to switch to a 4 door sedan Lexus thats at least a 2005 year.

I pay $815 every 6 months on car insurance right now for owning a Cadillac.
I spend about $60 in gas 3 times per week and I dont even drive around much.
Repairs and parts are very expensive as well.

If I switched to a sedan Lexus - how much would I save approx?
Would it be worth it? Would I save enough to make the switch necessary?

BQ: Any other cars besides Lexus that i could switch to save money? Something nice.
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