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LuckyFordGuy · 04-16-2018, 01:20 PM

I have been using Rotella T 15-40 for 10 years in my flat head 50 ford V8
Now they changed the label to Rotella T-4 15-40 and it says comparable to the previous Rotella T 15-40. My question is does it still have enough Zink in it?
Any response is appreciated. I don't want to ruin my cam. What is the next best oil for my flat head?

04-16-2018, 01:20 PM	#1
LuckyFordGuy Senior Member Join Date: Jun 2010 Location: MN. Posts: 325	Rotella Oil Question I have been using Rotella T 15-40 for 10 years in my flat head 50 ford V8 Now they changed the label to Rotella T-4 15-40 and it says comparable to the previous Rotella T 15-40. My question is does it still have enough Zink in it? Any response is appreciated. I don't want to ruin my cam. What is the next best oil for my flat head?