I only run Mobil 1 motor oil in my 95. I park it in the winter and before I park it I have an oil change done. Can I use regular oil for the winter while it is on blocks and then go back to the Mobil 1 when I start to run it next summer?

Also, I haven't had an oil change in a bit and the car has been sitting since September. I noticed today when I took it out of the garage that is is beginning to leak oil. Haven't checked from where yet. Previous to this the car hasn't lost a drop. Any ideas????
Thanks!
Mike

 

Im not real clear on the scientifics of it, but I believe synthetic oil is more stable when sitting for long periods of time, thus making it a good choice for vehicles that sit a lot.

Also, synthetic always seems to leak more than conventional oil, as synthetics have a detergent that breaks up sludge and carbon, often allowing leakage.

 

Just change to fresh synthetic right before you store it, but then in the spring you don't need to change it out, it'll still be good, so take it to your normal mileage as you always do.