Originally Posted By: 19jacobob93
At once ounce per 5 gallons would you even notice much effect? I know that is the standard recommendation because people noted rough running engines with anything more, and no effect with anything less, but I add at least double that! I really can notice a huge difference in smoothness especially at high revs where I no longer get the harsh thrashing and vibration. I also believe it increases compression slightly (same effect as a wet compression test, as well as lubing/unsticking the piston rings)
I get noticably better fuel economy too, and less pinging
I have had no problems running it at a higher concentration, pulled the plugs and they look perfect, no rough running or anything, quite the opposite actually
I say do it anyway, it can only have benefits if you start off at 5oz/gal and add a bit more if you feel like it.
I've experimented with tc-w3 right up to 100-1 in my other truck. It holds 100 litres fuel so I'd add a litre and fill up.
I found that at concentrations stronger than 200-1 there was a negative effect on fuel economy as well as sluggish operation. I attribute it to possible sensor fouling because of incomplete burning at cold starts and so on.
In fact I tried every treat rate combo out there and settled on roughly 1/3 litre per 100 of fuel. It's at that point,in my experience with that particular test mule,that richer gained no mileage vs leaner treat rate.
But every vehicle is different. I'd be inclined to go back to 200-1 in a non emission equipped carbureted engine.
I don't like spending money for no gain,so I wanted to establish at what point there was no more gains to be had. Funny thing though with tc-w3 once you go too strong mileage seems to be negatively affected in a computer controlled engine.