What if any are the advantages / disadvantages of using a lead additive in a M42 engine?
Only reason i ask, inside the filler flap of the 318is its says suitable for leaded or unleaded fuel. The touring says unleaded only.
The tourer has a cat with lambda sensor, the iS doesn't which i presume is the reason.
Lead Additive
Moderator: martauto
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maggspower
- Turbo Farmer Tractor Driver
- Posts: 2376
- Joined: Wed Oct 12, 2005 11:00 pm
- Location: Nowhere near South Wales, ok butt
Don't wast your money. All e30 engines are suitable for unleaded fuel.
Even upping the octane of the fuel is of no use, as the engine cannot use it as it has no knock sensors.
Even upping the octane of the fuel is of no use, as the engine cannot use it as it has no knock sensors.
Contact: theengineshedonline@gmail.com
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Brianmoooore
- E30 Zone Team Member
- Posts: 49360
- Joined: Mon Jan 10, 2005 11:00 pm
This label has nothing to do with lead additives, but to do with leaded petrol.
Back in the year that your car was born, which some of us remember well, petrol pumps generally dispensed 2 star, 3 star, 4 star and 5 star petrol, all of which contained the upper cylinder lubricant, lead tetraethyl, with the odd pump being available for the new fangled 'unleaded' stuff for the odd treehugger who had bought a car which did less MPG and produced less power and cost more than other outwardly identical models.
There were even a few oddballs around who drove diesel engined cars, and these often had to be filled in the commercial vehicle section of the forecourt.
Lead tetraethyl is poisonous to the filling of a catalytic converter, so the labels were there to inform E30 owners that they could fill with the unleaded stuff if they needed to, instead of 'normal' petrol, but the few who had cars with the emissions stuff had to use the unleaded.
Back in the year that your car was born, which some of us remember well, petrol pumps generally dispensed 2 star, 3 star, 4 star and 5 star petrol, all of which contained the upper cylinder lubricant, lead tetraethyl, with the odd pump being available for the new fangled 'unleaded' stuff for the odd treehugger who had bought a car which did less MPG and produced less power and cost more than other outwardly identical models.
There were even a few oddballs around who drove diesel engined cars, and these often had to be filled in the commercial vehicle section of the forecourt.
Lead tetraethyl is poisonous to the filling of a catalytic converter, so the labels were there to inform E30 owners that they could fill with the unleaded stuff if they needed to, instead of 'normal' petrol, but the few who had cars with the emissions stuff had to use the unleaded.