Another email to Lubegard. BioTech and Heavy Duty Engine Protectant are the same thing, just different package sizes.
Me: Pat, I really appreciate your reply on the phosphorous content. One other question though as I am quite the noob on the chemistry side; I read several people discussing ester-based engine oils as having very good cleaning properties while obviously not being as ‘harsh’ as something like an engine flush. So if you don’t mind, if you could answer a couple quick questions and I’ll be a very satisfied customer!
1. Are Bio/Tech and HD engine protectant (HDEP) the same product just packaged differently? If not, what are the main differences since the website does not explicitly state them?
2. Are the esters in Bio/Tech & HDEP the kind that will help remove varnish and sludging over time? What is Lubegard’s best product with these goals in mind?
3. If I am looking at extending my drain intervals while maintaining TBN and active cleansing agents, what is Lubegard’s best product for that?
Lubegard: We always appreciate positive interest in our engine oil supplement Bio-Tech. We have acquired quite a following for this product both domestically and internationally. It is designed to work with the additive package in the engine oil you select for your regular service. It will enhance the additive pack in the oil and will provide protection when the additive package in the oil does not provide the desired properties or placement to prevent wear and reduce friction. It will also extend the oxidative stability of the oil reducing varnish and deposits allowing extended oil change intervals and lessening the detrimental effects of additive depletion engine oils often experience. Your questions:
1. They are the same product packaged differently for applications with larger oil sumps than passenger cars and light trucks.
2. The esters will work to prevent sludge and deposits but is not designed to remove them. The mineral base oils are more the source of concern.
3. The Bio-Tech is our best engine product and will extend drain intervals.
Pat Burrow