moran75 Posted April 5, 2018 Share Posted April 5, 2018 Hi all Seafoam or Marvel as an oil additive - any opinions as to which is best?... Thanks in advance Kev Link to comment Share on other sites More sharing options...
KongaMan Posted April 5, 2018 Share Posted April 5, 2018 (edited) There ain't no Jesus Juice. More specifically, you're probably better off running a full fill of good oil than trying to find a mechanic in a bottle. Having said that, adding a quart of MMO for 1000 miles or so might help to loosen up a few deposits, then go back to straight oil. Edited April 5, 2018 by KongaMan (see edit history) Link to comment Share on other sites More sharing options...
petelempert Posted April 5, 2018 Share Posted April 5, 2018 I'm with Konga, if your engine is running fine (good compression etc) you don't need to add anything. IMHO, Seafoam and MMO should only be considered for an engine with a condition (like a noisy lifter or has been siting for a long time) that you are willing to experiment with a remedy as a prelude to committing to a rebuild. PRL Link to comment Share on other sites More sharing options...
1965rivgs Posted April 5, 2018 Share Posted April 5, 2018 Why? Tom Link to comment Share on other sites More sharing options...
Seafoam65 Posted April 5, 2018 Share Posted April 5, 2018 Between the two choices, Marvel Mystery oil is the best. It's a good way to clean out a dirty engine gradually. The main thing I use it for is to pour down the throat of the carb while the engine is running to treat sticky valves due to an engine sitting too much and not being driven. My Riviera had sticking valves at idle when I bought it, and treating the carb to Marvel Mystery oil down the throat cleared it up. Link to comment Share on other sites More sharing options...
rapom Posted April 6, 2018 Share Posted April 6, 2018 I like to put 6oz of MMO to a full tank of gas. Besides helping keep the combustion chamber clean it adds a little lube to the gas which keeps the ring and bore wear down. Link to comment Share on other sites More sharing options...
lrlforfun Posted April 6, 2018 Share Posted April 6, 2018 OK Riviera People: Marvel's is a superior product. Fresh oil, a fresh filter and a quart of marvel's is step.1. Step 2???? Berryman's B-12 in the tank almost every fill up. 30 years in the used car business and having a large Buick collection has given me braggin' rites. Mitch Link to comment Share on other sites More sharing options...
moran75 Posted April 6, 2018 Author Share Posted April 6, 2018 19 hours ago, 1965rivgs said: Why? Tom Im thinking aloud at mo, don’t really have specific reason for asking at this point other than judging by what’s under rocker covers I have a ‘dirty’ engine...car hasnt been driven out on road for 10 years car is being recommisioned and is now running/starting very well,though not yet driven on road - but will be soon - who knows what that will reveal... I’ll cross that bridge when I get to it .. Re dirty engine - During a previous post it was suggested to run engine with a little MMO and change the oil,maybe more than once - seemed like a good idea to me ..but just out of interest, as I keep seeing Seafoam mentioned elsewhere on the web, I was wondering what opinions if it was any better than MMO.... Link to comment Share on other sites More sharing options...
1965rivgs Posted April 6, 2018 Share Posted April 6, 2018 Opinions will abound re oil additives but unless you have a concern with sticking valves or lifters the best thing you can do is use a modern oil with flat tappet protection and USE the car. Get it up to operating temps for sustained periods of time and the deterergents in the oil with gradually and safely do their job as you enjoy driving while not flushing everything into the oil pan, especially around the oil pickup screen. Tom 2 1 Link to comment Share on other sites More sharing options...
60FlatTop Posted April 6, 2018 Share Posted April 6, 2018 1 hour ago, 1965rivgs said: use a modern oil with flat tappet protection and USE the car. Unbeatable combination. Simple as that. 2 1 Link to comment Share on other sites More sharing options...
rapom Posted April 7, 2018 Share Posted April 7, 2018 I’m pretty sure Sea foam is just a fuel additive where mmo can be used in both oil and fuel. Link to comment Share on other sites More sharing options...
KongaMan Posted April 7, 2018 Share Posted April 7, 2018 It's a floor wax! It's a dessert topping! Link to comment Share on other sites More sharing options...
TexRiv_63 Posted April 7, 2018 Share Posted April 7, 2018 Neither of those should be used to clean a dirty engine but I have had good luck with MMO as both an oil and fuel additive from a maintenance standpoint. Repeated use in a 34 Packard freed up a sticking valve and reactivated a dead cylinder. I do also agree with others that regular use of the car is the best "additive"... Link to comment Share on other sites More sharing options...
lrlforfun Posted April 7, 2018 Share Posted April 7, 2018 OK Riviera People: As long as you have the stomach for it, actually dropping the oil pan along with the Marvel's is the very best. Having the stomach? You might open up a big and expensive can-o-worms. There is at least an inch 'a sludge laying at the bottom so cleaning the pan like new can lengthen oil life, and reduce contamination. Marvel's Mystery Oil must be used with every oil change. Fresh 10-30, MMO and a fresh filter Berryman's B-12 in the tank and having your Nailhead (or other lawnmower engine) running on all 8 with good carburation and tuned up will give trouble free performance. Like i said, I sold thousands of cars in my carreer and this combo was really terrific! Link to comment Share on other sites More sharing options...
Turbinator Posted April 8, 2018 Share Posted April 8, 2018 On 4/6/2018 at 2:48 AM, lrlforfun said: OK Riviera People: Marvel's is a superior product. Fresh oil, a fresh filter and a quart of marvel's is step.1. Step 2???? Berryman's B-12 in the tank almost every fill up. 30 years in the used car business and having a large Buick collection has given me braggin' rites. Mitch Mr.Mitch, when you can remove baking soda from a biscuit without breaking the crust you can then have bragging rights. ?? Just having a little fun. My trick to help an older car engine is use ethanol FREE gasoline and change the oil and filter regularly. 1 Link to comment Share on other sites More sharing options...
Turbinator Posted April 9, 2018 Share Posted April 9, 2018 On 4/6/2018 at 3:55 PM, 60FlatTop said: Unbeatable combination. Simple as that. Concur. Link to comment Share on other sites More sharing options...
60FlatTop Posted April 9, 2018 Share Posted April 9, 2018 On 4/7/2018 at 6:00 PM, lrlforfun said: You might open up a big and expensive can-o-worms. Did you hear the one about the guy who bought the 50 year old car "just to have a little fun"? Bernie 1 Link to comment Share on other sites More sharing options...
RivNut Posted April 9, 2018 Share Posted April 9, 2018 On 4/7/2018 at 5:00 PM, lrlforfun said: OK Riviera People: As long as you have the stomach for it, actually dropping the oil pan along with the Marvel's is the very best. Having the stomach? You might open up a big and expensive can-o-worms. There is at least an inch 'a sludge laying at the bottom so cleaning the pan like new can lengthen oil life, and reduce contamination. Marvel's Mystery Oil must be used with every oil change. Fresh 10-30, MMO and a fresh filter Berryman's B-12 in the tank and having your Nailhead (or other lawnmower engine) running on all 8 with good carburation and tuned up will give trouble free performance. Like i said, I sold thousands of cars in my carreer and this combo was really terrific! "As long as you have the stomach for it......." should apply to lifting the engine just to drop the pan. Link to comment Share on other sites More sharing options...
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