Many of the later n/a SW20's ('94 plus) tend to knock on anything less than 98 ron fuel due to the higher compression and updated ECU.
Apparently they all run rich up to 4000 to 5000rpm with the standard ECU.
I even tried fitting a piggyback chip to try and counteract this but all it did was confuse the ECU and made it worse. Apparently Toyota know what they are dong and have designed the ECU to get the max out of the GSE n/a motor.

Tree 
Might have a look over the EGR and PCV that's probably the only thing left for me to do now,

Gen 2 3SGE's don't have a PCV valve, only have a hose from the throttle body to the cam cover.
 
Check for oil around the connection to the cam cover, the hose may be split like mine was. 

Mines turbo and you wouldn't think it but when I put the silencer in it runs like **** it's noticeably slower and soon with my fuel system upgrade I don't want it being restrictive at all

Senol

My pre rebuild compression was 195 across all pistons. The oil rings don't create compression. That's what the compression rings are for. All my oil rings were stuffed but my compression rings were fine. Sorry to scare you but it happens over time :/. Mine would also smoke under load. Keep an eye on your oil level.

If it's oil rings what are the other symptoms? My exhaust is not oily either, just dry soot. I'll just have to clean my exhaust to see how fast it's building up.
Yeh wiz mine is the 2nd Gen 3SGE slightly lower compression. It does have a knock sensor and the ECU car seems to be able to handle almost any fuel. Either way my spark plugs are not melted but rather the opposite (carbon) so knocking is prob the least of my problems hehe
If there's no PCV on the gen 2 then there's one less thing to worry/go wrong about!
If the turbo itself can be a muffler maybe you can get away with a straight thru and a few hot dogs :P

ah tree it seems everytime i visit the forum i see a post from you wanting to use **** quality fuel!
 
Back on topic:- 4 tips look gayer than aids itself on a SW20 imo

^LOL it's not that bad...for the sake of science and further evidence you can take the engine apart and see the damage of E10 when I do a swap :)

Thats the last thing i would feel like doing! pulled many heads off e10 run (well not run for long!!!) cars and none have been in good nick so no need to touch yours.

kameleon

Back on topic:- 4 tips look gayer than aids itself on a SW20 imo

yeh almost as bad as one big angled cannon muffler, just needs chrome wheels to finish it off

Another car with Quad tips
 

 

The wide body makes it work.
Her body makes it irrelevant.