*T4 vs T5 oil

Sep 23, 2009
1,475
O'Day 34-At Last Rock Hall, Md
Any difference between T4 vs T5 diesel engine oil. I have always used T4 15 40 wt before but WM only had T5 10 30 wt in stock last week.
 
Nov 6, 2006
9,885
Hunter 34 Mandeville Louisiana
T4 is "Natural, free range, gluten free" oil.. T5 is a blend of T4 and some synthetic stuff .. T4 is a better oil for your older engine because of its different additive package.. It is available at Wal Mart for a good bit less than West Marine.