I still think a lot of the deposits come from the gasoline, not just the oil. Here is a good article I am copying here I believe from the Rockett Fuels website:
(The old Union 76 fuels before ConcocoPhillips)
Myths - Leaded Racing Gasoline
Pg. 1 of 2
1. Myth: The higher the octane, the slower the burn.
Fact: In many cases, high octane gasoline has faster burning characteristics than low
octane gasoline. It is rarely slower.
2.
Myth: Too much octane reduces horsepower.
Fact:
Trying a higher octane fuel and getting less performance is usually due to introducing
additional variables with the different gasoline which can be overcome by re-tuning the
engine.
3.
Myth: Too much octane will burn up my engine.
Fact:
The only time your engine is aware of octane is when it doesn’t have enough. Using a higher
octane than the engine needs does not hurt or help.
4.
Myth: More Tetraethyl Lead is better.
Fact:
Tetraethyl Lead (TEL) increases the octane number of the gasoline. It reduces spark plug
life, contaminates crankcase oil, and reduces exhaust system life. More is not better.
5.
Myth: Leaded gasoline makes more horsepower than unleaded
Fact:
Leaded gasoline is legal for “ sanctioned off-highway events only” and does not allow the
engine to make more power unless detonation is present. More power can be made with a
street legal oxygenated unleaded gasoline than with leaded gasoline as long as there is no
detonation.
6. Myth: Adding nitromethane to gasoline improves power.
Fact: Nitro knocks the octane number down severely, and makes the mixture way too lean. Jeff
Smith, formerly of Hot Rod Magazine, tried this a few years back and destroyed an engine
before he got the A/F ratio correct.
7.
Myth: Propylene oxide is great stuff.
Fact:
It can be after you find out that it eats soft parts in the fuel system, needs to run richer, needs
to be stored in a cool place, evaporates easily, and can be a disappointment with improper
tuning.
8.
Myth: Aviation Gasoline is a good substitute for racing gasoline.
Fact:
Aviation Gasoline is designed for engines that run at 2700 to 2800 RPM. If your race engine
runs at this speed, aviation gasoline is the hot tip.
Wusz 08/13/04
Pg. 2 of 2
9. Myth: I can improve the racing gasoline by adding a little of this or a little of that.
Fact: We put a lot of scientific effort into making high quality racing gasoline. Being a
backyark blender can be hazardous to your health and to your car’s performance.
Don’t do it.
10. Myth: I can save money by mixing street gasoline with racing gasoline.
Fact: Race engines and performance street engines are built for max performance. You will
make more power with racing gas, especially if you use Rockett Brand TM 100
Unleaded Racing Gasoline in a street engine.
11. Myth: Octane number is power.
Fact: Octane number is resistance to detonation. Higher octane will increase power only if
detonation is present.
12.
Myth: The octane requirement of my engine is always the same.
Fact:
Operating conditions like air temperature, barometric pressure, humidity, and coolant
temperature have an impact on engine octane requirement.
13.
Myth: Detonation and Pre-ignition are the same.
Fact: Detonation can hurt your engine; Pre-ignition will destroy it.
14.
Myth: I want a slow burning gasoline for my race engine.
Fact:
Slow burning gasolines are not conductive to making maximum power. There is not
much time for combustion to take place at 6,000 to 10,000 RPM. Fast burn is best.
15.
Myth: All racing gasolines are the same.
Fact:
There are a variety of ways to make racing gasoline, depending on what type of
blending stocks are used. Some are better than others. All gasolines are not created
equal.
16.
Myth: Storing racing gasoline in plastic jugs is fine.
Fact:
Gasoline is best stored in sealed metal containers. Dark plastic jugs are acceptable,
but light colored plastic jugs allow gasoline color changes and tetraethyl Lead (TEL)
deterioration. The plastic caps can create sealing problems. Use a metal container
with a good sealing screw cap and be sure of what you have.
17.
Myth: To see if one racing gasoline is better than another, just pour it in and run it.
Fact:
A different gasoline has to be part of the tune-up; just like spark timing, carb jetting,
camshaft, valve lash, etc. Don’t over-simplify it. See #15 above.
For Your Nearest Rockett Brand TM Distributor, call or click:
1-800-345-0076 / www.rockettbrand.com
© 2008 Paragon Performance Products, Glenview IL 60026
(The old Union 76 fuels before ConcocoPhillips)
Myths - Leaded Racing Gasoline
Pg. 1 of 2
1. Myth: The higher the octane, the slower the burn.
Fact: In many cases, high octane gasoline has faster burning characteristics than low
octane gasoline. It is rarely slower.
2.
Myth: Too much octane reduces horsepower.
Fact:
Trying a higher octane fuel and getting less performance is usually due to introducing
additional variables with the different gasoline which can be overcome by re-tuning the
engine.
3.
Myth: Too much octane will burn up my engine.
Fact:
The only time your engine is aware of octane is when it doesn’t have enough. Using a higher
octane than the engine needs does not hurt or help.
4.
Myth: More Tetraethyl Lead is better.
Fact:
Tetraethyl Lead (TEL) increases the octane number of the gasoline. It reduces spark plug
life, contaminates crankcase oil, and reduces exhaust system life. More is not better.
5.
Myth: Leaded gasoline makes more horsepower than unleaded
Fact:
Leaded gasoline is legal for “ sanctioned off-highway events only” and does not allow the
engine to make more power unless detonation is present. More power can be made with a
street legal oxygenated unleaded gasoline than with leaded gasoline as long as there is no
detonation.
6. Myth: Adding nitromethane to gasoline improves power.
Fact: Nitro knocks the octane number down severely, and makes the mixture way too lean. Jeff
Smith, formerly of Hot Rod Magazine, tried this a few years back and destroyed an engine
before he got the A/F ratio correct.
7.
Myth: Propylene oxide is great stuff.
Fact:
It can be after you find out that it eats soft parts in the fuel system, needs to run richer, needs
to be stored in a cool place, evaporates easily, and can be a disappointment with improper
tuning.
8.
Myth: Aviation Gasoline is a good substitute for racing gasoline.
Fact:
Aviation Gasoline is designed for engines that run at 2700 to 2800 RPM. If your race engine
runs at this speed, aviation gasoline is the hot tip.
Wusz 08/13/04
Pg. 2 of 2
9. Myth: I can improve the racing gasoline by adding a little of this or a little of that.
Fact: We put a lot of scientific effort into making high quality racing gasoline. Being a
backyark blender can be hazardous to your health and to your car’s performance.
Don’t do it.
10. Myth: I can save money by mixing street gasoline with racing gasoline.
Fact: Race engines and performance street engines are built for max performance. You will
make more power with racing gas, especially if you use Rockett Brand TM 100
Unleaded Racing Gasoline in a street engine.
11. Myth: Octane number is power.
Fact: Octane number is resistance to detonation. Higher octane will increase power only if
detonation is present.
12.
Myth: The octane requirement of my engine is always the same.
Fact:
Operating conditions like air temperature, barometric pressure, humidity, and coolant
temperature have an impact on engine octane requirement.
13.
Myth: Detonation and Pre-ignition are the same.
Fact: Detonation can hurt your engine; Pre-ignition will destroy it.
14.
Myth: I want a slow burning gasoline for my race engine.
Fact:
Slow burning gasolines are not conductive to making maximum power. There is not
much time for combustion to take place at 6,000 to 10,000 RPM. Fast burn is best.
15.
Myth: All racing gasolines are the same.
Fact:
There are a variety of ways to make racing gasoline, depending on what type of
blending stocks are used. Some are better than others. All gasolines are not created
equal.
16.
Myth: Storing racing gasoline in plastic jugs is fine.
Fact:
Gasoline is best stored in sealed metal containers. Dark plastic jugs are acceptable,
but light colored plastic jugs allow gasoline color changes and tetraethyl Lead (TEL)
deterioration. The plastic caps can create sealing problems. Use a metal container
with a good sealing screw cap and be sure of what you have.
17.
Myth: To see if one racing gasoline is better than another, just pour it in and run it.
Fact:
A different gasoline has to be part of the tune-up; just like spark timing, carb jetting,
camshaft, valve lash, etc. Don’t over-simplify it. See #15 above.
For Your Nearest Rockett Brand TM Distributor, call or click:
1-800-345-0076 / www.rockettbrand.com
© 2008 Paragon Performance Products, Glenview IL 60026
Right on!
