Wanted to know if anyone has switched to amsoil syn. I have a 2004 f150 w/5.4l and after reading about extended life of oil (less oil changes and maybe better oil) i am interested to hear your opinion.

 

I USE IT IN BOTH MY DIESEL AND GASOLENE ENGINES AND LOVE IT BUT IT IS EXPENSEIVE BUT IF YOU ARE LIKE ME AND KEEP YOUR VEHICLES 10 YEARS OR MORE WILL SAVE YOU MONEY IN THE LONG RUN I ALSO USE AMSOIL GEAR LUBE I HAVE A 94 SURBURBURBAN GAS WITH 230 K AND A 94 F-350 7.3 DIESEL WITH 168 K WITH NO ENGINE PROBLEMS