I am so sorry that you are obsessed with attempting to be right. In order to get what I thought might be an authoritative answer, rather than some magazine drivel, I wrote Mobil. Here is their response. I sure hope this stops this foolishness.

"Mobil1 motor oils were officially launched on the retail market here in the US in 1974 but have been utilized around the world before the official launch dating back to the 1960's.

--
Thank you for choosing ExxonMobil products.
If you need further assistance, please contact ExxonMobil at 1-800-ASK-MOBIL
MJ"

Are you satisfied now???

Cheers

 

Just made the switch from Synthetic 5W20 Royal Purple & Honda filter; to Synthetic 5W30 Mobile1 & Fram premium filter.

I didn't really see any benefits out of the Royal Purple; no increased gas mileage or any noticeable performance different. The only thing I really noticed was my wallet felt a lot lighter after forking out all that cash at Mopac for it.

Goes in Purple, comes out black

The Mobile1 oil I put in seems a lot lighter both in texture and color.

 

Why did you change oil weights to something heavier? You may notice decreased MPG because of that.

 

In my 2.4l Altima motor Im using 10W30 Castrol mineral oil for the summer and 5w30 for the winter.

I think 0w20 is too thin... probably doesnt hold up too well in a load breakdown resistance test...

 

20 weight oils have proven themselves very capable in everything from Ford and Doge V-8s to tiny Honda VTECs. If you fear them, don't. That being said, I'm just wondering how many of you use thicker weights and what your impressions are? I've got massive amounts of thicker weights stockpiled and am considering slowly using a quart here or there w/ majority 20 weight to deplete the stash. Just wanted to make sure no one has a "Wait, 10W30 blew up my engine!" story.

Not to fuel any flames, but, boojum, I'd point out that Mobil 1 was in fact introduced in 1974 and was only introduced in Europe 1 year earlier. Obviously Mobil had experience with PAO prior to the marketing of M1 since they invented PAO in the 1940's. Careful with the retail phone/email tech help at Mobil1. They're notoriously clueless.

 

Everything discussed about oil is religion-like. No facts, just opinions and feelings and speculation...

 

Fact: 20 weight oils have been in a large chunk of the US fleet for years now.
Fact:There are no documented mass-implosions of engines running 20 weight.

I'm just curious about the other direction, anyone had any significat mpg drops running 30 weight? Anyone mix in a qt of 30 weight to thicken up their 20 weight? Just looking for any experiences out there as I have at least 240 qts of oil stashed away and exactly 3 are 5W20. I don't hesitate to run 30 weights and even the odd quart of 40 weight in my 02 CR-V. It never knows the difference. But this little 1.5 is so tiny...I don't want to strain it. I know, as a previous poster alluded to, that Honda, Toyota, et al spec higher viscosities in many parts of the international market. Just wondering specifically what they spec for the Fit. Anyone have any concrete evidence of Fit oil specs for other markets?

 

I switched over to penzoil platinum 5W-30 with a mobil 1 filter for my first oil change at 5k. I gained about 3mpg and the engine is much quieter and smoother. Then again I never ran 5W-20 synthetic in my car so I can't compare. But I did increase mpg from switching from the stock break in oil which is expected anyways. I plan on continuing using 5W-30.

 

Nice to hear no ill effects. Just curious, why would you expect to gain mpg by dumping the break-in oil. It should be loaded with moly and other anti-friction additives from assembly.

 

Well I figure the engine should be broken in pretty good by that time. I always thought engines get better mpg when broken in.

 

No you're right on that point! I just wanted to make sure you weren't saying it was the break-in oil and not the break-in itself.

 

I'm planning on cheap dino 5w-20 and 25% on the OLM for the warranty period, then switching to full synthetic and running the oil life monitor to 5%.

Pennzoil yellow bottle has proven to be an excellent 7k mile oil based on analyses done in many different engines. Less than $20 for a DIY oil change, you can't go wrong.

 

not really brand specific, but a good read about oil

FerrariChat.com - FAQ: Motor Oil Articles by Dr. Ali E. Haas (AEHaas)

 

AE Haas is a smart guy. Just keep in mind he's a doctor, not a tribologist or automotive engineer. Still, most of his stuff is spot on.

 

I tried a 0W-30 in my wife's Fit and noticed a negative effect on fuel economy. I switched back to 5w-20 and the mpgs went back up.
I've been using Castrol Syntec 5w-20 in my Fit since the first oil change. I like it!

 

Yeah, I'm planning on YB at 6 months. Which would be around 7,500k and 30% maintenance minder.

 

last oil change i used royal purple oil with mobil 1 oil filter, its seems pretty cool. the oil change before that i used mobil 1 oil with mobil 1 filter, and my 1st oil change i used castrol syntec oil with mobil 1 oil filter. i'm thinking of using Motul motor oil or greddy motor oil next. we'll see

 

One thing to keep in mind about viscosity is tolerances within the powerplant.

Modern engines have much tighter tolerances than those of the past - even 15 years ago. Oil, whatever weight, is a lubricant. Thicker = more cushion for greater gaps. A higher weight oil can cushion those larger gaps in worn/older engines.

If I put 20W oil in my 1960 Studebaker - idle oil pressure would probably be less than 5 lbs. With 15W40 it idles at @20 lbs - and going down the road averages @ 50 lbs at @ 2500 rpms.

 

Synthetic oils shine at 7-10k+ change intervals. 7k miles also happens to be right at the limit of where a lot of 5w-20 dino oils can be run to, and happens to correspond with both warranty and OLM telling you to think about changing.

No reason to run syn when a dino will do the job just fine. I'll save the syn for my 7-10k mile changes in my Buick.

 

I certainly intend to run the breakin oil until at least 5%, myself. Nothing but easy highway miles for me. Just ran the breakin on the wife's Odyssey down to 10%, which ended up being 5,700 for her driving. I WANT to run synth but realistically, I agree there's probably no need in this engine using the maint minder. Besides, since I'm not pulling from my oil stash for 5W20 and buying it new, I am not wastin gmoney on synth. Probably YB or even plain old Quakerstate for me. But..spiked with arx...