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Formula F oil 5W30 Fully Synthetic.


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#1 ghiamondeo

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Posted 08 February 2011 - 07:47 PM

I have today enquired at Ford for some oil and was told that they only supply Formula F 5W30 Fully Synthetic oil. This is the oil that they use and it replaced Formula E, but in the past I have used Halfords 5W30 part Synthetic.

Has any one on here used Formula F in his MK3 TDCI? I am a little confused as the book states to use part synthetic and not full.
Do you think that I should stick to Halfords Oil or go for the Fully Synthetic oil?

Thanks!
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#2 b_ellebaut

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Posted 08 February 2011 - 08:06 PM

I think it's better to stay with the semi synth oil if everything is fine.
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#3 Mabok01

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Posted 08 February 2011 - 08:35 PM

I have used the formula f for three changes now and have no issues with it.
I can't see that ford will knowingly sell something that will harm your engine.
Ford use this oil in all their own changes according to a Ford tech who posts on here.

By the way I do 70,000 miles a year so have done nearly 40k on this oil now as I am due another change soon.

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#4 salta

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Posted 09 February 2011 - 10:58 AM

I have today enquired at Ford for some oil and was told that they only supply Formula F 5W30 Fully Synthetic oil. This is the oil that they use and it replaced Formula E, but in the past I have used Halfords 5W30 part Synthetic.

Has any one on here used Formula F in his MK3 TDCI? I am a little confused as the book states to use part synthetic and not full.
Do you think that I should stick to Halfords Oil or go for the Fully Synthetic oil?

Thanks!

HI formula f is in my thoughts a textured oil and is not fully synthetic and is fomulated for the specific ford use ..so when you go in the shop and read the label unless they have two foumula f ..oils on sale now it shuld say it is fomulated for ford diesel use and nowhere on the can say fully syntthetic..If any doubt remains stick wiht halfords oil ad beelebut says and i agree with him if you have always used it why change now and yes semi synt..is best for the motor if it has been reared on on same ..the old adage ..the road you go is the road you know ..springs to mind..s

#5 ghiamondeo

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Posted 09 February 2011 - 09:06 PM

thank you all for your replies!

I will be sticking to Halfords oil as had no issues with it and do oil changes every 11K miles.
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MK1 Focus C Max Zetec 1.6 Petrol.


Previous Fords: Escort MK6 Ghia TD, Fiesta MK5 Ghia, Escort MK4 L.

#6 guffer

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Posted 12 March 2011 - 09:52 PM

The dealer is correct. Ford specify fully synthetic oil in all their newer pug based diesels, and is backwards compatible with the semi synth as used in the Mk3's. I had a turbo go on mine at 90K using proper decent semi synth oil, and had been changed well before time. Also turbo idled before shutting off (after motorway driving when stopping at services etc), allowing it to cool before switching off, and driving with low boose until it had some heat in it.
After doing some digging, the semi synth oil really needs to be changed after 7.5k because its trashed by then.
The castrol site now recommends using the fully synth, but with a slightly longer service interval of 12.5K.
I'm now running on the fully synthetic. Yes, it costs more, but I think its going to be worth it.

#7 Micky

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Posted 13 March 2011 - 12:49 PM

The dealer is correct. Ford specify fully synthetic oil in all their newer pug based diesels, and is backwards compatible with the semi synth as used in the Mk3's. I had a turbo go on mine at 90K using proper decent semi synth oil, and had been changed well before time. Also turbo idled before shutting off (after motorway driving when stopping at services etc), allowing it to cool before switching off, and driving with low boose until it had some heat in it.
After doing some digging, the semi synth oil really needs to be changed after 7.5k because its trashed by then.
The castrol site now recommends using the fully synth, but with a slightly longer service interval of 12.5K.
I'm now running on the fully synthetic. Yes, it costs more, but I think its going to be worth it.


Semi-synth is a misnomer, it doesn't have to be 50% synthetic oil to be sold as semi (my understanding is that someone won a court case years ago that allows the continued use of the weasel word description). The one thing fully synth does well is to continue to work as miles rack up, I've certainly noticed that my TDCi is quieter after an oil change (10k to 12.5k intervals) using semi-synth. I'm now using fully synth (about £60 for 20 litres). Not certain how well fully synth deals with diesel contamination which used to be the main reason for changing engine oil.

#8 white91

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Posted 13 March 2011 - 01:08 PM

I used Ford Formula F for my last service, I suggest using the best oil you can afford, and I also believe fully synthetic is better than semi synthetic, but that is just my opinion.

#9 ktbltd

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Posted 14 March 2011 - 10:52 AM

Just bought 6L Formula F from Ebay for £27 including delivery ...pretty reasonable price i think and its the right spec ..anybody searching for it might want to look there

#10 AlexSTx

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Posted 08 October 2012 - 11:40 AM

If in any doubt read this. It says it can be used in new and older ford engines so thats good enough for me.

http://www.fordparts...ordPartsToolBox

Scroll down the page and click on the oil pdf.




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