I started doing my own car work this summer, basic stuff like changing fluids etc, nothing fancy. In the past, I would just leave the car to the mechanic for an oil change. Never really bothered much which oil he puts, how much etc. After reading a BITOG, I started becoming more curious what goes in the car.
I changed oil with SuperTech High mileage 5W-30 in my 2006 Sentra. The car has been really sluggish, would take the time to speed up etc. Would struggle go up the hill. I also changed the spark plugs. Planning to do 3-month oil changes for a year to clean up the engine. I will drain the oil this weekend. Last week, I added 10oz of MMO to almost 3 qt of engine oil and went out for a 100 mile trip.
On the way back, I noticed the engine performance improvement. There was a 'pep' if I can put it like that. Next day, I took it on the hill to see how it performs on the uphill slope. It did fairly well. During regular in-town driving, I feel the car being more responsive. Yesterday, I asked DW to take it to work and she also noticed similarly.
I wonder what does it indicate and how this should be approached further? Any pointers welcome. I don't want to go get a can of Kreen but would like to know if that should be the next step.
Thanks in advance.
MMO improved performance, what does it indicate?
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MMO might have thinned out your oil a bit, ive noticed running thinner oil in my minivan made the throttle response improve. About to change oil on my truck to thin and see if it has the same response.
No need to get Kreen. MMO does the same thing, just many people say that it does so a bit "slower" than Kreen. That is a good thing. Stick with MMO. Use 5-10oz in the oil 100 miles before the oil change (every OCI), and use 1oz/1gal ratio for the fuel to give that a good cleaning too. Hopefully you will see even better results in power, responsiveness, and fuel economy, like many of us on BITOG have experienced.
Well if you didn't change the plugs then I would say the MMO did something but since you did the plugs then that is where you got the improved performance from.
Im sure the spark plug change made a slight difference. Run back to back tanks of a quality fuel system cleaner & see it that helps at all also??? Good luck!!!
Originally Posted By: Rat407
Well if you didn't change the plugs then I would say the MMO did something but since you did the plugs then that is where you got the improved performance from.
I am ruling out spark plugs because the oil change and the spark plug change was performed within 2 weeks of each other. The car is running for 2+ months on new spark plugs and I didn't notice this 'pep'. This change is less than 10 days old. Hence, my hunch is more in MMO.
Originally Posted By: MoneyJohn
I am ruling out spark plugs because the oil change and the spark plug change was performed within 2 weeks of each other. The car is running for 2+ months on new spark plugs and I didn't notice this 'pep'. This change is less than 10 days old. Hence, my hunch is more in MMO.
I find most 5w30 dexos 1 too viscous for NA engines, Ive been subbing 1/2 > 1 qt 5w20 to thin the sump a bit. This will affect HTHS and KV. Most of these engine have been fairly YOUNG, so that would be a factor to consider.
OP is just subjective. Doubt it helps.
KREEN is much more effective than MMO, but pretty agressive ... BG109 (EPR) is somewhere in the middle. I suspect you had stuck rings. I'd run full can of BG109 in two consecutive 3,000 oil changes and see what happens. Suspect you'll get a bit more GO 
You definitely need to get the KREEN maybe 2 or 3 bottles of it, since MMO did not make any difference. Yeah the MMO always fixes cars but only with 2 or 3 KREEN treatments immediately afterwards. We don't know how any of this works, that's a bona fide Mystery, we just know that it does ernt thert's gerd enerf fer me. It must be the Chlorocarbons. Bleach has chlorine in it so you know it's cleaning out the engine and removing stains and outperforming regular oils on "the bandit". 
Originally Posted By: ARCOgraphite
Ive been subbing 1/2 > 1 qt 5w20 to thin the sump a bit. This will affect HTHS and KV. Most of these engine have been fairly YOUNG, so that would be a factor to consider.
Originally Posted By: BrocLuno
KREEN is much more effective than MMO, but pretty agressive ... BG109 (EPR) is somewhere in the middle. I suspect you had stuck rings. I'd run full can of BG109 in two consecutive 3,000 oil changes and see what happens. Suspect you'll get a bit more GO
Originally Posted By: MoneyJohn
I am hesitant of using Kreen because everyone suggests that its aggressive.
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I liked Vlad's idea because if MMO is cleaning, let it do the job for 3-4 short OCIs and then plan anything else. It may also give some idea what is actually going on (if cleaning the crud so the oil will be coffee brown etc.).
I think the 3 month OCI will help the car run w more pep
MMO has been around my entire life, and I've heard and/or read many,many articles about MMO. I've used it as an oil additive and I don't have an opinion one way or another as to how effective it is. I think MMO is just another oil concoction that has a distinctive odor. Maybe one notch above being a "mousemilk."
Originally Posted By: HosteenJorje
MMO has been around my entire life, and I've heard and/or read many,many articles about MMO. I've used it as an oil additive and I don't have an opinion one way or another as to how effective it is. I think MMO is just another oil concoction that has a distinctive odor. Maybe one notch above being a mousemilk.
When I deal with possible fuel system issues - I add a full quart of MMO to the 10-12 gallon gas tank and top it off. On the next 3 tanks I do 1oz/1gal ratio. After that it is 10oz/tank every 4th fill up. So far had ZER0 issues with such plan. Love the minty smell 
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