SOHC.co.uk Forums > CB350/400

Exhaust preservation

<< < (3/5) > >>

Lobo:
I add 2T in my various 4 stroke tanks…. but more with a thought to protecting the tank internals.

Q. I thought modern 2 stroke oils are designed to fully combust and leave no residue wrt green credentials…. so would it actually be protecting the exhaust? (I’m using a marine 2T as it’s what I have in the shed; think it burns really clean)

Q2. How would standard (mineral / synthetic?) engine oil behave if added to the tank at 100:1; would it benefit the exhaust internals more?

350Simon:
Castrol R it is. Smells like sweet candy

Sent from my SM-G780G using Tapatalk

Johnwebley:
the exhausts on my 500 are now about 30 yrs old,


  initially I used to put oil in the petrol,but seldom do now,


   they are a little corroded externally,because it gets used,

 my mantra is NO short journies ,minimum run 10 miles,and rev the bike hard to get heat into the pipes,

  luckily without lead we don't seem to get to much corrosion

Orcade-Ian:
I have a genuine Honda 4 into 4 system on my 350/4, bought new from DS when they were still available and poured oil in mine when new.  Still looks new nearly 20 years on - but only about 8000 miles and not used in salty winters.  It can't do any harm and I don't think the aftermarket DS is any worse than the originals.  I like the idea of the addition of castor oil (K2-K6) - how did you land on 1:100?  This needs exploring methinks.
I've just done a 1200 mile trip on a 95 BMW R100RT and got caught out at one place with only E10 available so I bought some Putoline E10 additive in case - might just be snake oil though.  We are fortunate in Orkney that E10 can't be shipped to us.

Johnny, I think one capful of 2T is way too much - my cap is 6 7/8"  8)

Ian

K2-K6:
 " I like the idea of the addition of castor oil (K2-K6) - how did you land on 1:100? "

Technical hedging to get going thus considered:- aggregated experience from many different two strokes at 50:1 being more or less as smoke point deminishes, going above this as desirable but needing to have some effect along with ability to judge that effect reasonably started at 100:1 principally to gauge if there were any unwanted obvious problems without having commited to clean a system out (intending to just run neat fuel through to purge if necessary) by stripping etc.

Going back a litte though, I'd run castor oil without problem in a Honda four stroke 2kw generator set with no adverse effects. Along with varying static periods it has given no observable problems over multiple years of use.  Tank storage/condition and carburettor bowl + jets remain very clean too but this has until recently been with E5 fuel supply.

Intending to then move it onto more extensive field trials  ;D as I became more interested in the effects then decided to go as start point with 100:1 and also without problems in fuel system or combustion.  You can only really smell it as R when starting rich idle is operating or under full load acceleration with, again, richer conditions in combustion.  Since moved it to 75:1 with still no visible smoke but a little more characteristic smell, although extremely mild unless same richer conditions as above description. This too on originally E5 and now E10 with no non E fuel intentionally used.

Navigation

[0] Message Index

[#] Next page

[*] Previous page