Are Royal Purple oils compatible with other motor oils?

Can I use HPS in my diesel engine?
August 17, 2018
Can your motor oil be used in older engines?
August 17, 2018
Yes. Royal Purple lubricants are fully compatible with mineral or synthetic oils. No special procedures are necessary when switching to Royal Purple. We recommend against intentionally creating a mixture of different brands or product lines of engine oils.
Category: Motor Oil