What is the difference between Sea Foam Motor Treatment and High Mileage? [SOLVED]

Thanks for the question James. Even though both products are very similar, High Mileage’s cleaning formulation is more suited to handle heavier/stubborn fuel and oil residue/deposit buildup in higher mileage gas engines. The cleaning and lubrication blend was developed to help everyone keep their gas engines running cleaner and longer… And thanks for giving High Mileage a try – you will like it!

Jim, given that the high milage formulation is more suited to handle heavier/stubborn fuel and oil residue I imagine it is stronger. Is there any increased risk in using that in an older higher milage car, 2007, with the assumption that the plastic part/gaskets are older and may not be able to handle a stronger product?

Good question, Anthony. High Mileage is very safe for plastic parts/gaskets. There’s no risk in an older vehicle. Hope that helps!

Can Sea Foam Motor Treatment (sf16) and Sea Foam High Mileage both be used in diesels? In crankcase oil? In the fuel oil?

Hey Nick – Sea Foam Motor Treatment (SF16) can be used in diesels. You can use it in both the diesel fuel, and the oil. Lots of guys like to clean fuel injectors with it: https://seafoamworks.com/shop-talk/sea-foam-official-video-how-to-clean-diesel-fuel-injectors-without-removing-parts/

High Mileage is not labeled for use in diesels. However, if you accidentally added it, it won’t hurt anything.