Mobil 1 in the car since 3k miles and and any dirt cheap 10w30 in the 77 pickup. the lawn eqipment and snowblowers get what is handy. The snowblower pulls easier and starts better with mobil 1 when it is below zero but it uses a bit more.
my 89 Camaro with the 2.8 would not crank over in the winter one year very good at -10 with standard 10w30 in it so I put Mobil 1 in and it would sing and start right up at -25, so it was worth it using some just to get it to start. It was the cheapest vehicle on gas at the time with 24 miles to the gallon cruising and 19mpg in town. now it sits and waits for a transformation to become a real Camaro someday.
Shieffer oil is supposed to be the same good ole oil it used to be and a lot of the racing crowd in town use it specifically with good results. It's a bit expensive but they like it.
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