Cap,

I don't doubt your experience. But, as a rubber compounder in an earlier life I can say with certaintly that some current rubber raw stockis animprovement over what was available say 30 years ago.

HOWEVER, some types of rubber, Hypalon for example, a stock that goes into high pressure hydraulic hoses and certain high temp belts among many other things including sheet, has had to change due to EPA regs. The change was not for the better in this case and no matter what we did as compounders, the finished goods didn't work as well as older rubber did.

Relating to rubber parts in Walbros, to me, it depends entirely on where they get their rubber part supplies and how good the supplier'scompounders are. Changes do happen over time and that includes the compounders/chemists. And with China making great headway into all markets, chemical supplies is another market play, for cheap.

Was it TR who said that there's whole bunch of additives in gas? Absolutely true....Gas milage has improved dramatically over the past 30 years, andgas additives along with lean running/fuel injected technology isa good starting place for that.

Yet another reason I don't mess with autogas; only avgas for me. That formulation has not changed in 70 years and is the same in CA as in TX as in MN as in NJ with no known seasonal effects. I ran a gallon of premium autogas once about a year ago when I found myself in a bind. But switched back as soon as I gota freshstash of avgas