I have a 95 caravan with about 235,000 miles 3 litre engine. Im currently running havoline 10w30 and I would like to go a little thicker because of the lifters pecking from time to time. But im unsure of what weight I should run. Any suggestions would be very helpful. I would like to try to avoid a lifter change because of mileage. It doesnt burn any oil just leaks about a quart between changes. and it also holds decent oil pressure. And I would like to stick with havoline if possible.