USED to be... sae 30 was a very plain oil and low rated... BUT NOW... you can buy hd 30wt oil full of robust additives rated for diesel compression AND for gas spark use. So... with that sae30 hd oil, I no long have an objection to using the HD version with all the great stuff added to the very plain base oil. IRONICALLY, its almost twice as much$$$$$ for it as it is for the 15w-40 oil... of which in my mind is actually a much better base oil than the hd 30w..I want oil that has the cling properties to prevent dry starting that damages cam shafts (GM), the anti piston coking at the ring lands(cummins), the anti friction additives that stop the tappet and cam follower wear(cummins and cat), the modifier that stops the piston scuffing, the high alkali additives that neutralize the the acids, The anti clump additives that stop sludge from forming. All is part of the hd additive package... And then there is... the initial cold flow and starting of the 5w-xx but the high temp protection of the xw-40 oil. But now... for more money$$$$, you can run the hd sae30 and come quit a bit closer, if you take away cold starting and high temperature... again at a higher cost. Saw the hd sae30 in the diesel section of wallyworld... But there's nothing wrong with it. IIRC a quart of it was about same$$ as half of a gallon of the 15w-40. from the department of redundancy department.
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Today's Featured Article - Trailering Your Tractor - by Curtis Von Fange. One of the fun things of summer and fall are the parades and tractor shows that go on across America. Many owners of tractors travel long distances to attend these shows and they usually take their restored iron along with them. Safe trailering practices and inspections will ensure that the event is a fun one. A good habit to develop when using a trailer is to give that �quick look over� before taking it on a trip. Before hooking up to it check the tongue for proper operation. The latche
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