Rotax 4/ Oil

[facthunter]

A bromine based additive was used to scour lead from the combustion chambers and that went out the exhaust. How would any oil additive remove lead from the oil? It might keep it in suspension  so it goes out when drained but that would require an explanation of the effects on the oil and the chemistry involved and a warning about disposal if such oil.  There's also a lot of different SYNTHETIC oils Ester based ones are still around. . This is for the experts not the internet surfers.  Nev

[skippydiesel]

35 minutes ago, facthunter said:

A bromine based additive was used to scour lead from the combustion chambers and that went out the exhaust. How would any oil additive remove lead from the oil? It might keep it in suspension  so it goes out when drained but that would require an explanation of the effects on the oil and the chemistry involved and a warning about disposal if such oil.  There's also a lot of different SYNTHETIC oils Ester based ones are still around. . This is for the experts not the internet surfers.  Nev

You exceed your knowledge base

[facthunter]

I have no idea what you mean.  Nev

[skippydiesel]

FYI

 

[Red]

I've always used any semi synthetic motorcycle oil that was up to spec (most exceed spec) and happened to be available, I dont put much store in the various claims of superiority the competing companies make they all have to pass the same tests for quality and performance

Just my opinion, I have others😁

[facthunter]

Oils are getting more application specific all the time. You can risk a serious failure if you don't use the product meeting the Maker's specification. Nev

[spacesailor]

I'm told to use " none " synthetic oil in my " old  " style half Volkswagen motor . ( 30 w )

But I like the new oil that ' thicken's ' as it heats up .

( there's a name for that ) ..

20/50 w,  runs like 20 when cold but is like a 50 w when hot .

spacesailor

 

 

[facthunter]

Same oil with additives and a shorter life. for multigrade.    Nev

[Red]

9 hours ago, facthunter said:

Oils are getting more application specific all the time. You can risk a serious failure if you don't use the product meeting the Maker's specification. Nev

The oils I use meet or exceed the makers spec, which of course is not the same as "recommended"  which is far looser term often influenced by factors quite apart from efficacy

[spacesailor]

I'm told " synthetic " is ' Less ' sticky than 30w grade.

As I give my motor lots of turns to raise the oil pressure 

It should be good to go with lots of oil already circulating

In the cold motor .

spacesailor

 

[facthunter]

You can get TOLD lots of things. Todays synthetics mix with ordinary oils but are of more consistent quality. Most  are made from " LNG."   Nev 

[BrendAn]

17 hours ago, spacesailor said:

I'm told " synthetic " is ' Less ' sticky than 30w grade.

As I give my motor lots of turns to raise the oil pressure 

It should be good to go with lots of oil already circulating

In the cold motor .

spacesailor

 

i always wind my jab motor over with mags off until oil pressure needle moves. i don't know if it really makes any difference though.

[facthunter]

Can't do any harm. A rebuilt motor, I always prime. Nev