Thanks guys. The tractor has 3588 hours on it with 240 on the oil change. The reason why I added the Lucas is because of high temperatures while pulling a demanding planter. With high temperatures and non stop load for hours coolant temps will reach 200f sometimes. I’ve seen oil pressure...
My first oil analysis with about 240 hours on my New Holland TG275 with the 8.3 Cummins. The brew was Delvac Extreme 15w-40 and 2qt of Lucas oil stabilizer. Out of a 5 gallon total capacity I am surprised that the viscosity increased by 2pts.