Well, here goes. Nearly all of today's modern base oils are paraffin based. Fact. Look it up. I don't use Pennzoil but I ended up with my son's car that had over 130K and drove it to 200K. Head gasket leaked at about 175K so pulled head. It was as clean as the day it was assembled. He used Pennzoil. Was not good about changing it. Some times went over 7k miles according to the stickers. Secret, he was on the road a lot. I have seen many, many engines full of sludge with all different brands of oil. Secret, they were used intermittently and with poor servicing on oil changes.
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Today's Featured Article - Oliver 550 Purchaser Checklist - by Greg Sheppard. Pound for pound the 550 is better than anything I've seen. It has great power for its size and can really hunker down and lug. Classified as a 3-bottom plow depending on soil conditions. I personally don't think it can be beat for a utility tractor in the 40 HP range. They are extremely thrifty on fuel, at least my DSL is. Most drive train parts are fairly easy to get. Sheet metal is probably the hardest thing to
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