Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.
Better to use MMO...this you can keep in the motor for a few miles, then change w/out damage. I bottle at the most...1/2 is better.
The Seafoam is best for the gas [IMO]. If you really want to de-gunk your motor try ATF...drive for a few miles [it may smoke too] then change the oil.
BTW, Seafoam's own product label is either woefully inadequate, or dead wrong.
It says 1 pint per 10 quarts of oil (so on an 850 w/turbo cooler drained, putting in a full can isn't too far out of spec).
It says NOTHING about draining the oil "immediately".
I used about 3/4 of a can of Seafoam in my crankcase and left it in for about 10 days. No unwanted side effects.
The biggest risk when doing this job is drafting too aggressively into the intake and hydrolocking the engine. I can't see how leaving it in the crankcase would destroy the RMS. If that's true then they REALLY need to update their product labeling.
I bought a can (haven't used it yet) and noticed on the directions that there still is no specific instruction on how long one leaves it in the crankcase. I noticed that for a diesel application it says leave it in for an hour. I went to the website for Seafoam and found the same thing, so I've sent off an email to get clarification specifically for the crankcase for a gasoline engine vehicle... will post back when I hear back...
And another thing... JRL or anyone else, have you tried the trans tune product they use?
The "definitive" answer... from Jim Davis at Seafoam. He sent me three technical bulletins as well as confirming in his email that it can be used as a pre-cleaner before an oil change, as well as after-care for fresh oil between oil changes... in a gas engine. I am cutting and pasting the first bulletin so all can see.
Sea Foam Motor Treatment used in Crankcase Oil
All Gasoline and Diesel, Rotary style engines
Sea Foam Motor Treatment is a Blended Petroleum Product, NOT A CHEMICAL and is widely used as an old oil residue reducer and moisture drier in any oil crankcase.
Sea Foam Motor Treatment is most commonly used as a pre service, old oil residue re-liquefier / cleaner / diagnostic tool, and moisture drier, and is also used as an after service additive. Sea Foam Motor Treatment does NOT add significantly to oil volume, so removing oil is NOT required for use, when used according to printed directions on the product container.
1. As a PRE SERVICE CLEANER for old oil residue, (sticky rings or valve train noise, diagnostics), pour 1 ½ ounces of Sea Foam Motor Treatment into the engine oil crankcase for EACH quart of crankcase oil capacity including filter. (Diesels use 1 pint Sea Foam to 4 gallons of oil, please.) Drive a MINIMUM of 30 minutes/miles, MAXIMUM 200 miles, (Diesels 1 hour drive/run time MINIMUM) and then do your oil change service (LOF). This is the process of safely/slowly re liquefying the old oil residue so contaminants may flow and be filtered. This also makes your old oil dirtier, quickly, so a LOF service is necessary when the oil gets dirty. Great for Turbo & Supercharged applications where hot oils deteriorate so quickly due to heat, those residues NEED CLEANING. (LOF = Lube oil & Filter service = OIL CHANGE).
2. As an AFTER SERVICE ADDITIVE into fresh oil, nearly fresh oil, or oil (used condition) that is NOT ready to be changed (by mileage), put 1 ½ ounces Sea Foam Motor Treatment into the crankcase per quart of capacity as described above, then SELF SET a program to MONITOR your oil for proper level, color and clarity on a mileage, timed, or event basis (like every time you add fuel, etc.) to determine when an oil service is necessary. (LOF) When the oil gets dirty, CHANGE IT!
Sea Foam Motor Treatment will safely and slowly re liquefy old oil residue, This will usually make your oil need changing BEFORE your normal scheduled LOF service. Only your monitoring of the oil for color and clarity can tell when it is time to do LOF (oil change service), or 3,000 miles, whichever comes first.
Synthetic oils, both blends and 100%, were engineered and are manufactured to be 100% compatible with petroleum based oils, all brands, and vice/versa. Without compatibility, oil manufacturers and engineers would be liable for the results of mixing non-compatible lubricants.
Check your oil; monitor its level, color & clarity to determine the need for an LOF service! Change your oil when it gets dirty!
Technical Services Department July 2008 DD
Sea Foam Sales Company
4 Cycle Type Engines
Diesel
Rotary (Wankel)
2 Cycle type Engines
Sea Foam Products recommends an average of 1 ounce Sea Foam Motor Treatment to each gallon of Gasoline (including 5%, 10%, 12% & 15% Ethanol) and Diesel fuel, including (off road low sulfur) & Ultra Low Sulfur blends.
With any vehicle or system using E-85 fuel, use 2 ounces Sea foam per gallon of the fuel.
For Ultra Low Sulfur Diesel blends, Sea Foam recommends a MINIMUM of 1 ounce Sea Foam Motor Treatment per gallon of the Ultra Low Sulfur Diesel fuel. Using more Sea Foam adds more Lubricity.
Parameters are: 1 – 16 ounce can of Sea Foam Motor Treatment to a MINIMUM of 8 gallons of fuel, Maximum 25 gallons fuel to a 16 ounce can for maintenance. Follow the instructions above for OIL INJECTED engines also. (NO Sea Foam Motor Treatment ever goes into the oil reserve tank for oil injection engines!).
***For all gas/oil mixed fuels (2 cycle) use 2 ounces Sea Foam per gallon of the mix. If your fuel is E-85, use 3 ounces per gallon of the E-85 and oil mix.
Sea Foam Motor Treatment is blended OIL, and will not run a gasoline, Gas/oil mix or Ethanol engine without introducing HYDROCARBONS (gasoline or gas/ethanol blend) .
Fuel injector cleaning machines in a controlled environment use Sea Foam Motor Treatment as their safe Cleaning agent mixed with gasoline or ethanol blend at a ratio of 50 to 60% Gasoline/Ethanol blend PLUS 40 to 50% Sea Foam Motor Treatment.
Technical Services Department
Sea Foam Sales Company
Minneapolis, Minnesota
Sea Foam Motor Treatment #’s SF-16 (16 ounce), SF-128 (gallon container) and
SF-55 (a 55 gallon drum) is registered with the EPA as a fuel additive for use in all Gasoline, all Ethanol fuels, Gas/oil mixes & ALL Diesel fuels. Including all brands and qualities of available fuels.
When added to these fuels, Sea Foam Motor Treatment was specifically designed to Safely do five (5) simple, yet important, tasks for you, SIMPLY. They are:
1. Sea Foam Motor Treatment is a 100% blended petroleum product. That means Sea Foam is OIL, so adding Sea Foam to ANY fuel, adds lubricity for Fuel systems, Induction systems (Including Drawn through Supercharged applications), upper cylinders, fuel pumps, and related fuel system & exhaust (Turbocharged) components. Ethanol fuels need LUBRICITY, Sea Foam supplies that Lubricity! All common available fuels lack “Protecting” lubrication.
Advantage: “Sea Foam”.
2. Sea Foam Motor Treatment contains an engineered oil that dries fuel moisture. Moisture breaks down into its basic components of hydrogen and oxygen when Sea Foam Motor Treatment is added to any of the above listed fuels. This allows Sea Foam Motor Treatment to help eliminate problems caused by moisture, like diesel fuel gelling and Ethanol “Phase Separation”. Ethanol absorbs moisture, Sea Foam dries it! Advantage: “Sea Foam”.
3. Sea Foam Motor Treatment contains an oil based high detergent fuel residue cleaner. Using Sea Foam Motor Treatment in your fuel system makes that old fuel residue safely back into liquid. Old fuel residues become a “non issue”, allowing contaminants to be filtered, as engineered by the system manufacturer.
Advantage: “Sea Foam”.
4. Sea Foam Motor Treatments exclusive formula is blended specifically to clean carbon out of the engine as the engine is run. This is accomplished by our cleaning oil formula eliminating old sticky oil residue that holds carbon and allows that carbon dust to flow out of the engine dust particle by dust particle. Advantage: “Sea Foam”.
5. Sea Foam Motor Treatment adds volatility to fuel and slows down the rate at which that fuel looses its ability to properly burn. When added to fuel and the fuel is in properly sealed containers or fuel systems, per printed container instructions, Sea Foam Motor Treatment is a fuel stabilizer for up to 2 years. Always run the engine for a long enough period of time to assure the entire system is protected. Advantage: “Sea Foam”.
Technical Services Department
Sea Foam Sales Company
Updated July, 2008 DD