Anybody still using 30 weight CJ-4 oil in a Navistar 7.3L IDI

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Lazer, Nov 5, 2024.

Page 2 of 2

Nov 7, 2024 #11

W923 Road Train Member

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I’ve run 15-40 delvac in my 93 idi for the last 200k miles…it’s got roughly 400k on it total I don’t know what the previous owner used but the 15-40 can’t be too bad for it
Case/ih farm equipment used to have a love affair with 30wt might try your local farm equipment dealer

W923, Nov 7, 2024

W923, Nov 7, 2024

#11
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