[gryffishhawk571]

Originally Posted by catskillclimber

Take a look at your O2 sensors. I changed both and cleared up a rough idle.

Thanks, appreciate hearing that!!--will discuss with BMW next time I'm in

[gryffishhawk571]

Originally Posted by Uber Commuter

Wow - blast from the past lol

No, Optilube won't harm your car - I've used it for more than 400,000 miles in both VW TDIs and my 328D.

Unless Optilube has majorly changed their line-up, summer is going to be lubricity enhancing only; but definitely won't hurt and should smooth the idle a bit. Just don't overload the car; in this case "more is not better"...

Thanks! Hoping there's also some cetane enhancement as well. Planning to slowly transition/try some of this soon. Appreciate the feedback and history.

[Enabled]

I've been using Hot Shot Secret EDT for about two years now. It seems good; it's often very hard to prove that these do what they say since there are so many variables in a non controlled world. But it's great that there are options.

[andreigbs]

+1 on Hot Shot. I like their stuff and use it regularly.

I also like Amsoil's all-in-one diesel treat.

Going to order OptiLube and try it out.

[Uber Commuter]

Originally Posted by gryffishhawk571

Thanks! Hoping there's also some cetane enhancement as well. Planning to slowly transition/try some of this soon. Appreciate the feedback and history.

There is - seems Optilube updated their Summer product so it is now lubricity + Cetane.

[Onizukachan]

Another vote for optilube xd. It’s only ~3oz per tankful so what I did was buy a couple of the 8 packs of 4 oz bottles on Amazon, and once I started refilling them, buy the much bigger bottles.

Keep one in a ziplock (cause stinks like diesel) in the hatch always so I always have one to hand when it is fill up time, the rest on a shelf in the garage rest for the next monthly fill up or road trip.

Figured a little extra lubricity and cetane never hurt anything.

Texas does also have higher min cetane rating. Pretty sure all the fuel in town comes from the local refinery, so I just use a single station near my house I see lots of trucks filling up at, amd that has proper diesel nozzles… ie less risk.

[FaRKle!]

Originally Posted by Onizukachan

so what I did was buy a couple of the 8 packs of 4 oz bottles on Amazon, and once I started refilling them, buy the much bigger bottles.

I do the same, except I bought some twin-neck Bettix bottles. Those are measure and pour bottles, but refillable.

[capt_slow]

Originally Posted by Uber Commuter

There is - seems Optilube updated their Summer product so it is now lubricity + Cetane.

I dont think they updated any of their marketing materials with the new formula's HFRR score. I would hope it would narrow the gap to be much closer to XPD's 250 score. Those of us in warmer climates dont need the winter properties of XPD, but prefer it for the better lubricity.

[King Bowser]

Interesting read, just picked up a 328d and will definitely be ordering some Opti-lube Summer for the car. Im used to e85 and 93 and only use Shell for my Mustang and Camaro. Is BP the standard for Diesel or is Shell okay too.

[andreigbs]

Originally Posted by King Bowser

Interesting read, just picked up a 328d and will definitely be ordering some Opti-lube Summer for the car. Im used to e85 and 93 and only use Shell for my Mustang and Camaro. Is BP the standard for Diesel or is Shell okay too.

Congrats on the 328d, you'll love it.

IMO, both branded diesels are fine, as is Mobil's. Just be aware that not all Shell or BP stations offer Shell or BP branded diesel. Look at the pump itself for this confirmation.

As a general rule, stay away from fuel stations that don't seem to have a lot of diesel traffic. With the extended driving range a diesel offers, there's no need to ever be "low on fuel in the middle of nowhere" and get some $hitty fuel with water in it. I prefer to get my fuel from busy truck stops where I know they always have fresh fuel.

Oh, and I always use a fuel additive.

[triax37]

Originally Posted by floydarogers

Trucks and pickup trucks and cars all use the same diesel. Even farm tractors and locomotives use the same diesel as cars. The only places that have "better" diesel in the USA are in those states following CARB rules; and that really only affects attributes that affect it's Cetane. The major problem, as mentioned, is the scar (lubricity) qualities.

Bumping an...older...thread. Most diesel fuel additives (rough estimated cost of $0.20/gallon) claim to improve lubricity. Is it accurate to conclude that the additives (Optilube, Powerstroke, etc.) would lower that lubricity rating, from 520 to...

Thanks!

[bmwPower99]

Been adding 300ml (per 60litres of fuel ) of low ash 2 stroke mineral oil to my 35d for 5 years niw. Car idles,sounds and performs better. IMO This should be a must in the states where the diesel is rubbish and is responsible for HPFP failures, the 2 stroke lubricates everything and stops this issue. The other big benefit is that the diesel burns more completely with much less black particles which should in turn reduce carbon buildup. This video shows how good it is compared to some of the more expensive products

[Eddamoo]

Originally Posted by bmwPower99

Been adding 300ml (per 60litres of fuel ) of low ash 2 stroke mineral oil to my 35d for 5 years niw. Car idles,sounds and performs better. IMO This should be a must in the states where the diesel is rubbish and is responsible for HPFP failures, the 2 stroke lubricates everything and stops this issue. The other big benefit is that the diesel burns more completely with much less black particles which should in turn reduce carbon buildup. This video shows how good it is compared to some of the more expensive products

Im sorry but that video proves absolutely nothing apart from the authors lack of understanding of combustion.

The fuel that is smoking the most is also burning the fastest. Incomplete combustion through lack of oxygen produces black smoke, so its only logical that a more volatile fuel will smoke more - it needs more oxygen to burn cleanly.

A cetane booster is designed to burn fast as it helps the diesel ignite - it reduces ignition lag.

The main risk of using heavier oils in diesels is injector fouling. I once read that they can clog injectors pretty badly so have always stayed away.

[bmwPower99]

Originally Posted by Eddamoo

Im sorry but that video proves absolutely nothing apart from the authors lack of understanding of combustion.

The fuel that is smoking the most is also burning the fastest. Incomplete combustion through lack of oxygen produces black smoke, so its only logical that a more volatile fuel will smoke more - it needs more oxygen to burn cleanly.

A cetane booster is designed to burn fast as it helps the diesel ignite - it reduces ignition lag.

The main risk of using heavier oils in diesels is injector fouling. I once read that they can clog injectors pretty badly so have always stayed away.

A study found that 2so with zinc can cause issues with injectors. A low ash mineral 2so will not have zinc. The reduction of sulphur in diesel has greatly reduced lubricity of Diesel the 2so helps with that.