Originally Posted by BillyE
2017 F-350 Powerstroke... Since break-in, I've used Red Line 15W-40. Due to the expense, I'd like to switch to another oil but I'm concerned that the switch might result in a leak. As I understand it, Red Line might tend to swell seals more than other oils. Thoughts? Am I overthinking it? Thanks.
IMO no problems switching brands, and the first time I switched brands in my Series 60 Detroit, I had concerns too.
I started the engine off on Mobil Delvac products, 15W40 Super and 10W30 Elite in the winter for approximately the first 180,000 miles. Due to greater availability I switched to Delo products, 15W40 LE then 15W40 SDE and I used Delo XLE 10W30 in the winter.
I noticed a slight bit of consumption when first switching from Delvac to Delo, but nothing major. My motor used roughly 1/2 gallon more than usual over 15,000 miles. After the first run on Delo, I had zero additional consumption after that. As I've read here the engine may (or may not) consume a little extra oil while it "adjusts" to the difference in additive packages between brands.
At approximately 340,000 miles I switched brands again. This time to Phillips 66 HDEOs. I use Guardol ECT 15W40 and Guardol ECT 10W30 now, and I noticed zero difference in consumption when I first switched.
Long story short, IMO no worries to switch brands.