Add Oil to Petrol tank with Autolubes?

stephenmcdermot · 18 March 2007, 23:21

Would adding a wee bit of oil to the petrol tank incase the auto lube was faulty cause the engine to run lean when the autolube is working ok?

Nos4r2 · 18 March 2007, 23:33

If you're that worried then remove the autolube and run premix. If you put enough in to stop damage if the autolube fails then you'll be oiling plugs.

martini · 19 March 2007, 00:00

Quote:

Originally Posted by Nos4r2

If you're that worried then remove the autolube and run premix.

I agree, rip all that junk outta there! I had a Ficht 150 for 1 season and the oil injection failed wrecking the motor.

I'm totally pro old skool now - carbs and pre-mix, less to go wrong! Does put your running costs up though, fuel & oil. Worthy trade off when you had experience like mine

stephenmcdermot · 19 March 2007, 15:21

Are autolubes not generally bullet proof? Will the alarm go off if it stops working?

martini · 19 March 2007, 18:48

The autolube on my engine was, for all intents and purposes, functioning correctly hence no cut out or alarm going off. But for some reason maybe a blocked injector the oil wasnt actually getting through to where it should. I guess nothing in this world is bullet proof or completely fail safe.

Swifty · 19 March 2007, 22:05

The oil alarm on my Merc only squeaks when the level in the tank is low. It sorta relies on the oil pump to do its work without actually checking how well its doing it.

benc · 19 March 2007, 23:11

I believe the warranty on my Yamaha engines are void if I put any oil in the petrol. I have to use the auto mix!

I will check that though!

al40 · 20 March 2007, 00:21

Quote:

Originally Posted by benc

I believe the warranty on my Yamaha engines are void if I put any oil in the petrol. I have to use the auto mix!

I will check that though!

I thought the general recommendation was to run through a tank of pre-mix if you have had any work done on the engine (or it's been sitting for an extended period). Air bubles can get into the oil injection system and even with it primed, a small air buble could cause damage if it meant a cylinder wasn't getting oil.

To answer an earlier question, my old Suzu had an oil flow meter as well as tank sensor to check the oil was actually getting to the engine - was before the pump tho so didn't actually check that oil was going to all 3 cylinders!

thorper · 20 March 2007, 10:58

For the Yam HPDI engines its quite specific - let the engine do what its been designed to do. Given the complexity of the oil/fuel injection system on it, I'm quite happy to go with that!

al40 · 20 March 2007, 14:07

Quote:

Originally Posted by thorper

For the Yam HPDI engines its quite specific - let the engine do what its been designed to do. Given the complexity of the oil/fuel injection system on it, I'm quite happy to go with that!

Agreed, Any modern direct injection like E-TEC, OPTI, TLDI etc should never have oil mixed in with the fuel.

For normal carb'd 2-stroke oil injection tho, I don't see any issues.

BogMonster · 20 March 2007, 20:57

When I got my boat it had a tank of premix and the guy I bought it from said that somewhere in the book it says that if you have broken into the oil system you should run a full tank of premix fuel through it and make sure the level in the oil tank is dropping before switching to pure petrol. I did, and it was a bit smoky but ran fine - carb 2 stroke.