Wanagetmuddy
New Member
I have ran my 300 tdi for yonks on proper transesterificated biodiesel. I too have a TD5 and have not tried bio in it yet. I am going to though as I have had plenty of fuel related problems with mineral diesel in the TD5 and never any with the 300 on bio.
I have done the same milage in both vehicles and people told me the bio would ruin seals etc. Not seen any leaks from the old 300 but plenty from the td5 on bio.
As far as I am aware bio lubricates better than mineral diesel so that should sort any lift pump probs with the in tank pump on the td5. If its proper bio it should be the same viscosity as mineral as the gloopy part has been removed so the injectors shoul handleit also.
i am going to go with the old thought of good clean fuel no problems and dirty fuel plenty of problems. I will try a mix of 25%bio and 75%mineral to start and try it till I can get to 75% Bio with no probs. I run 100% bio in the 300!
Change filters every 1000 milles for the first 3k then at each 5 k after that. Always pop a tad og mineral in (10%) if very cold conditions i.e. -4 each night for two or three days.
As for MPG it shoul be the same but bio is way cheaper so it helps a great deal. Check out the Fuelpod 2 by greenfuels - you soon get your cash back.
I have done the same milage in both vehicles and people told me the bio would ruin seals etc. Not seen any leaks from the old 300 but plenty from the td5 on bio.
As far as I am aware bio lubricates better than mineral diesel so that should sort any lift pump probs with the in tank pump on the td5. If its proper bio it should be the same viscosity as mineral as the gloopy part has been removed so the injectors shoul handleit also.
i am going to go with the old thought of good clean fuel no problems and dirty fuel plenty of problems. I will try a mix of 25%bio and 75%mineral to start and try it till I can get to 75% Bio with no probs. I run 100% bio in the 300!
Change filters every 1000 milles for the first 3k then at each 5 k after that. Always pop a tad og mineral in (10%) if very cold conditions i.e. -4 each night for two or three days.
As for MPG it shoul be the same but bio is way cheaper so it helps a great deal. Check out the Fuelpod 2 by greenfuels - you soon get your cash back.
PASTMASTER
Well-Known Member
I've used properly recycled cooking oil from PureFuels in my TD5 at 50% with no problems, but only on a long run, after which I filled up with diesel, reducing the mix to about 25% - again no problems starting next day.
Checked the fuel filter at service. A bit of crud but nothing serious.
Make sure it's properly made bio. There is crap about, they say.
You might get slightly better MPG as it's got a higher cetane rating - a bit like using BP Ultimate.
discomania
Well-Known Member
That to be honest thats the ONLY biodiesel - other stuff is simply VEG OIL.
PASTMASTER
Well-Known Member
Yes. The advice is don't use veg oil on a TD5. Some people disagree though!
Apparently viscosity is the key. Veg oil is thicker in general and when cold is far thicker than proper bio or mineral diesel. The old school Bosch pumps on 300 tdi's etc can handle it as they are super tough.
Modern gismo fuel systems rely on much finer tolerances and therefore require a constant source and grade of fuel. Any fluctuations can cause problems but ****e fuel is ****e fuel and will either thicken up when cold, block filters or wear fuel components early. Any of these are bad for diesels. the key is quality every time in fuel, filters and filter changes. Skimp on any and you pay in the long run far more.
Modern gismo fuel systems rely on much finer tolerances and therefore require a constant source and grade of fuel. Any fluctuations can cause problems but ****e fuel is ****e fuel and will either thicken up when cold, block filters or wear fuel components early. Any of these are bad for diesels. the key is quality every time in fuel, filters and filter changes. Skimp on any and you pay in the long run far more.
