Re: Fleetguard LF9070 - extended drain interval?
Reply #5 –
The use of the TBN number is just a convenient guide to oil change intervals as there are other indicators that can also only be determined by an oil analysis. We used it as we had a large number of units of different sizes, duty cycles and fuels. We did not care about it on a daily basis but only when doing oil change interval analysis.
We can really over-think this folks. The amount of use to oil change interval in an RV is well taken care of if you follow the engine manufacturers recommendations.
These technical papers are meant for others in the industry who know how to read them. It's like reading a medical book. By the end of it you will find you have several conditions that you never knew you had!
Remember, the manufactures know a lot more about their engines than the users do. If you can ever get a tour of their engine plants and or research facilities you would be impressed. I know I have been.
Keith