Sta-bil question....

Can I use the marine formula in my lawnmower or do I need the regular?

Should not be a problem. It has the same stabilizers as the regular. In fact, it may be a marketing gimmick to sell more product.
IMHO.

I only use marine in everything

You can use it for everything.....I have been doing this for several years

I use in in the boat , chainsaw , generator , powerwasher , and especially the lawnmower !!!

In doing some reading all I could find is the Marine has a little stronger mixture of the Stabilizer which should make it better for any motor that will be in storage for a long period. Like G I just use it in everything and have had good results and no problems with any of my small engines coming out of storage.

Thanks for the responses guys. I've got to mow one more time so I'm gonna put some in the mower.

I store all my gas with Stabilizer added. The marine gas gets Sea Foam.