Schaffers 131 vs 131C?

[OCDoiler]

I use Schaffer's Neutra 131 (gas & diesel) in everything. They make a version that's made from soybeans 131C (gas only). Anybody use the soy formula or have opinions, pro/cons...

 

[scott30si]

I have been using the 131C Soy Ultra for a couple of years now and my 2001 Sienna runs so smooth that you can hardly feel or hear it running. No scientific facts just my opinion. I recommend it.

 

[kschachn]

Was your Sienna rough running before? The 1MZ-FE in my old Sienna runs very smooth.

 

[Onetor]

Soy ultra is awesome!

 

[scott30si]

Yes, then after a couple of tankfuls it smoothed out.