Fackman
New Member
Does anyone run a fuel additive like Boostane or any of the hundreds of others on the market?
Top tier gas question
- Thread starter gimpy
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10SHOpp
New Member
I ran Shell 87 in a Honda I had a while ago. Ran that sucker for 200k miles, never had a check engine light come on, never had an issue with the engine. Decided I would stick with Shell for all my vehicles. My current fleet runs premium and NEVER sees anything but Shell. I was driving the SHO down from Atlanta and my aunt had put some off brand 87 gas in the car and it ran like SH**. No power, bucking/shaking, etc. Ran that tank damn near empty, stopped at Shell and put 93 back in it, all power restored almost immediately.
That has nothing to do with brand and everything to do with octane. Off-brand 93 will perform better than Shell 87.
Jeff2017
SHO Member
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The main thing different about top-tier gas is that it comes with detergent added which will keep your injectors and valves cleaner. Of course DI engines don't benefit as much from it.
Johnbigdog
SHO Member
To clarify for the rest of the board who do not know. Our cars fuel into the cylinder (direct injection), not the intake port (port injection). Since no fuel is injected into the port, the intake vales are not cleaned (the engine will consume oil vapors from the P.C.V. system and some oil from the turbos) and can carbon up. This can restrict air flow or cause sticking valves. There is not a ford appoved cleaning procedure at this time for the valves.
The new 3.5L H.O. in the Raptor and Navigator have both port and direct injection and can switch or use both at the same time. These valves will be cleaned.
Have you heard of a Ford-approved steam clean procedure for baked on carbon? Supposedly do not have to pull the heads for this one.
There is little to no data in the advertising the oil companies do about detergents in fuel when it comes to direct injection. I guess you would have to read SAE technical papers to glean anything.
There is little to no data in the advertising the oil companies do about detergents in fuel when it comes to direct injection. I guess you would have to read SAE technical papers to glean anything.
Johnbigdog
SHO Member
At first I was thinking of scouring the W.S.M. again and thought, no he is joking and talking about Meth. Injection.
But pray, do tell. Am I missing something. I would think if there was an approve method I would have found it.
I'm sure that a good fuel will help keep the pistons clean. I have been informed that that carbon can absorb fuel vapors and lead to misfires. How much I believe that.... mmmmmm. I dunno.
Just a fragment of a conversation overheard while in the shop. So rumor-like you might say about the steamcleaning, LOL.
As far as clean fuel, we assume that top tier gas is clean from contaminants such as rust, water, etc. However do the detergents create dirty fuel as a sideeffect, i.e., does fuel not burn as cleanly as it could without the detergents, that is a separate matter.
Pennzoil claims to create "clean" engine oil using natural gas as the source, so if that is true, it should not only help keep the engine clean but the combustion chamber as well when the PCV fumes are burnt off.
As far as clean fuel, we assume that top tier gas is clean from contaminants such as rust, water, etc. However do the detergents create dirty fuel as a sideeffect, i.e., does fuel not burn as cleanly as it could without the detergents, that is a separate matter.
Pennzoil claims to create "clean" engine oil using natural gas as the source, so if that is true, it should not only help keep the engine clean but the combustion chamber as well when the PCV fumes are burnt off.
Johnbigdog
SHO Member
Ok. Cause where I am, I would have expected to hear it.
Untill then, keep slamming heads at em! Sometime warranty costs are the only way to make changes
Top Tier is only about the detergent and nothing else. It's does nothing for rust, water, etc. But every stations, Top Tier or not, should be using a filter to catch rust. Water is absorb by the 10% ethanol.
Some detergents, while cleaning injectors and valves, can contribute to combustion chamber deposits.
Crazyeights
SHO Owner
So am I wasting my money running Shell 93 octane?
Absolutely not. Shell 93 is a "special" breed of gas IMHO. It makes a noticeable difference from 87 even on our Fusion Sport (3.5 NA). But I would definitely run a tune if I ran premium gas
Otherwise run the Shell 87 if you are completely stock, and you should be golden. More importantly, monitor your KR and OAR from fuels at various stations, and use the fuel that is the most consistent with the best results.
Johnbigdog
SHO Member
If you want to split hares, not running 93 is not a waste. Tested the Taurus sho fine print. The advertised h.p. and lb-ft rating was on 93, not 87.
Can you run 87. Yes.
Can you run 87. Yes.
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