1) Test your oil three times to determine the maximum drain interval for the engine/oil combo you are using. This is when the TBN drops to 2.0 using ASTM D-4739, or the oil thickens by 25% ....For diesel engines, I'd also include a hard limit of 2.0% on the soot concentration. Depending on the engine, any one of these variables may be the limiting factor in the drain interval.
2) For a gas engine, reduce this max. drain interval by 25% and use this as your standard drain. For a diesel engine, reduce this drain interval by 33% and use this as your standard drain interval....Note: Acid and soot buildup in diesel engines can be very damaging, hence you want to use a more conservative drain interval if you aren't doing regular oil analysis ....
3) If your operating conditions change significantly or you do major engine mods, repeat step #1 and step #2 ....
Tooslick
www.lubedealer.com/Dixie_Synthetics
2) For a gas engine, reduce this max. drain interval by 25% and use this as your standard drain. For a diesel engine, reduce this drain interval by 33% and use this as your standard drain interval....Note: Acid and soot buildup in diesel engines can be very damaging, hence you want to use a more conservative drain interval if you aren't doing regular oil analysis ....
3) If your operating conditions change significantly or you do major engine mods, repeat step #1 and step #2 ....
Tooslick
www.lubedealer.com/Dixie_Synthetics