BC12D-4-85
SPONSOR
Fairbanks, AK.
Which oil was the first? My guess would be the 15-50. Right? Wrong?
Kurt
Yes the 15W-50 went soon after application and rust formed within a month. That was the earlier formula. Later they added the Lyc anti-scuff or whatever else to fortify the product and I redid the test later. Same results. 1st to go 15W-50, then the 20W-50XC, last was the older white can 50W but not the current updated Aeroshell W100, or even better yet their W80 or W100 plus with even better anti-wear and corrosion add packs. I have no interest in Shell products-disclaimer.
Base was my 500 gallon fuel tank. I sanded off the side coating to bare steel and cleaned with alcohol. I then applied an equal amount of the three oils about one ounce from a shot glass and let them run down the tank's side. The 15W-50 ran the fastest and furthest, followed by the 20W-50, and last the aeroshell 100. The 100 never rusted much and the 20W-50 was also better than the early 15W-50. Temps were Fairbanks summer and it rained. Lasted over two months and by winter the straight 50W was still holding hands with the steel and had flies stuck to it. The rest were gone.
Gary