Hi Listers,

        I have about 140 K miles on my 1.9. Currently using Castrol 20/50.  I often don't start the van for weeks at a time and soon it will go into winter storage.  If I change the oil to Synthetic. Will that help with protecting the bus and perhaps prevent the engine ticking that happens when I don't start her for several weeks?

If I change is there a weight or brand I should use?  
 
Also, may be helpful to know that from June to October I added almost a quart of oil but only ran the bus for about 2,500 miles. She is not a daily driver.  Used for special trips from May to October and will run about 3,000 miles a year.

I live in Vermont so I may have to start her now and then in cold temperatures.

Suggestions greatly appreciated.

Eric Caron 
85 Westfalia GL Auto