Question Griggs 30gal Aux Tanks

Hi Dale;
Sorry someone hasn't gotten to you sooner-I was hoping someone with actual experience would weigh in.

I do not have operational experience so the only help I can be is to refer you to www.griggsaircraft.com.

That's company that manufacturers and sells the tanks.

If you've found more information, I would appreciate it if you can find the time to post it here.

153 gallons is quite a fuel load.

Best,
Steve

We recently purchased the Griggs aux tanks for our 1977 Seneca II and are having them installed this spring. 

The plane currently has the existing factory 'extended range' tanks of 123 gallon total.  These additional nacelle tanks would make approximately 153 gallons, it appears.

Does anyone have flight ops experience with these aux tanks?

  - Dale