Off to Alaska Soon YES in FEBRUARY
I know this will sound strange but there is a good chance that I will accept a job in Fairbanks for the summer that will require me to leave Tucson very soon to start the trip north. However it me...
Forum Discussion
As on an earlier post....the OP had stated he was going to use Shell Rotella T6 brand, which is a 5W40 diesel engine blend that is fully synthetic.
As my youngest vehicle is a 1976 Lincoln Mark IV and never owned anything newer, I only run semi synthetic 10W30 Valv-O-Line during the winter months....and run straight weight SAE 30 or SAE 40 premium conventional Valv-O-Line racing oil during the summer months in all my rigs as this brand has the highest amount of ZDDP zinc additive added available to lubricate the overhead cam most effectively on older american cast iron V8 designs.
For all my differentials in every single vehicle I run Valv-O-Line semi synthetic 80W90 gear oil - year round.
The only time I use full synthetic oil (75W90)- is for my standard transmission (New Process NP435) on my 1970 Dodge Truck, year round also.....as that oil never seems to break down....I only replenished the oil in it once in a 12 year span since running it, and the old oil drained out still seemed very fresh.....the semi synthetic blend in the trans case did change color a little bit after running it for 6 years previously before first replenishing with the full synthetic blend, noticed it shifted a little easier during the winter too.
As my youngest vehicle is a 1976 Lincoln Mark IV and never owned anything newer, I only run semi synthetic 10W30 Valv-O-Line during the winter months....and run straight weight SAE 30 or SAE 40 premium conventional Valv-O-Line racing oil during the summer months in all my rigs as this brand has the highest amount of ZDDP zinc additive added available to lubricate the overhead cam most effectively on older american cast iron V8 designs.
For all my differentials in every single vehicle I run Valv-O-Line semi synthetic 80W90 gear oil - year round.
The only time I use full synthetic oil (75W90)- is for my standard transmission (New Process NP435) on my 1970 Dodge Truck, year round also.....as that oil never seems to break down....I only replenished the oil in it once in a 12 year span since running it, and the old oil drained out still seemed very fresh.....the semi synthetic blend in the trans case did change color a little bit after running it for 6 years previously before first replenishing with the full synthetic blend, noticed it shifted a little easier during the winter too.
