Mobil 1 5w50 Supercar DexosR, 2017 Corvette Grand Sport

[CarlB]

Edited my virgin sample onto the report.

Lead is left over from last track day, since only 9qt is removed/added at each oil change. Also I can smell the leaded fuels for a long time after as the tank mixes.

 

[SubieRubyRoo]

Why would you run leaded fuel on a 2017? There are plenty of unleaded fuels with similar octane ratings the last time I looked.

Thanks for the reports!

 

[CarlB]

Why would you run leaded fuel on a 2017? There are plenty of unleaded fuels with similar octane ratings the last time I looked.

Thanks for the reports!

110 is leaded at the tracks I go to. (Sunoco) The car doesn't have a catalytic converter, so it's fine.

 

[buster]

Wear looks good. I still think something is off with Mg/Ca. It's too low. Either way it worked.

 

[wings&wheels]

Guessing that you don't drive on leaded fuel constantly, so probably not an issue but any idea if modern synthetics suspend lead better than early ones? Having lived through the Mobil AV1 issue, lead suspension could be a problem w/ certain synthetic bases.

I have an antique onboard that I run on a mix of 100LL and UL and run conventional oil for this reason. I need to look into this more...

Thanks for posting.

 

[thastinger]

Guessing that you don't drive on leaded fuel constantly, so probably not an issue but any idea if modern synthetics suspend lead better than early ones? Having lived through the Mobil AV1 issue, lead suspension could be a problem w/ certain synthetic bases.

I have an antique onboard that I run on a mix of 100LL and UL and run conventional oil for this reason. I need to look into this more...

Thanks for posting.

If you only need 100 octane have a look at Boostane Marine, it works.

 

[wings&wheels]

If you only need 100 octane have a look at Boostane Marine, it works.

Thanks, it is the valve seat protection as well as octane.

 

[fantastic]

You know the source of the lead and it didn't seem to bother the Corvette. Have fun!

 

[thastinger]

Thanks, it is the valve seat protection as well as octane.

Castrol makes a product called "Valvemaster Plus" that is a lead substitute, I haven't seen it on shelves in a lot of years but might be able to locate it online.

Dug this up: https://bobistheoilguy.com/forums/threads/lead-replacement-additives-for-classic-cars.311210/