New to Forum, advice welcomed

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Hello to all on this interesting forum.

Based in the UK so I suspect the vehicles I have are different to many US or Canadian specs but I think the engines are fitted in other NA spec vehicles.

First vehicle is a London Taxi. 2007, that I rent to a friend that is a Taxi Driver.

Have not done any UOA but I am.trying to find a lab to do these near me.

The engine in this is a VM diesel engine (2500cc). Similar to 2.8 diesel engine fitted to later Jeep Liberty. The 2.5 version was fitted to the earlier Jeep Cherokee(Liberty) from 2002/2004 in the UK.

The normal oil change interval 10k miles. With a 10w40 B4 oil. Either semi synthetic or synthetic.
Though you can also use a 0w40 B4 oil.
I have been doing 5000 mile changes with a Chevron 10w40 Semi Synthetic from Costco. And also having some services done by a taxi trade garage. Using a Q8 10w40 Full Synthetic and a 10000mile interval when using this.

After reading the forum I have bought 10litres of 10w40 semi synthetic Maxlife, due to some minor oil leaks and also to see if it helps.in anyway.

The engine is just shy of 170k miles now. Original engine and autobox.

I basically want to stretch out the oil change interval. I hope to do UOA and have emailed Blackstone to ask if they have a lab in the UK or if I can send samples to them.

I am also thinking about a bypass setup aswell.

The vehicle does 50/50 highway/urban.

Temperatures are obviously not as hot as parts of the States and the vehicle is used in late afternoon into the night. Once started up the vehicle will be run pretty much solidly throughout a shift with an hours downtime part way through shift. Shift length 9/11 hrs.

In the operating conditions these Taxis operate this model (TX4) has some incidences of engine problems specifically bottom end problems relating to poor lubrication. And probably a cavalier attitude to maintenance. It isn't unusual for a Taxi to be run up to 16k on semi.synthetic oil !!

The oil filter I use is a Hengst. Nice big filter. And the sump capacity it just under 7 litres.

Any opinion will be gratefully recieved.

I will either continue with Maxlife if it helps the slight oil leakage. But I am also open to using Mobil 1 0w40 Turbo Diesel or the new 0w40 New Life.

I have been using Mobil1 TD for 2 yrs in the wifes Clio DCi on 9k intervals and recently.switched to New Life. Both the same price in Costco. Just under £30 for 5 litres. Cheap for UK as it can cost up to £55 for 5 litres but probably a bit more expensive than the US.


The other vehicle I would like some opinon regarding my oil change regimen is a 2008 Nissan Pathfinder. A 2.5 turbo diesel automatic. I think the engine and trans is similar to that fitted to the Nissan Titan in the US.

The normal interval for an oil change on this is 18k miles. Time wise I think.it is every two years if mileage isn't reached.

The specs for that vehicle are 5w30 C3 oil. Sorry I don't know the American equivalent only ACEA specs. But it is mid saps as it has a DPF.

This time around (@98k) I changed the oil and put in Carlube 5w30 Fully Synth C3 and a Nissan filter.

I have a Hengst filter already and intend to use Castrol Edge 5w30 C3 oil. It has 104k on it at the moment but the Carlube oil was an emergency puchase as I needed the oil changed that day and Costco was closed. The cost for the Carlube oil.was £72 for 10 litres. The sump on the Pathfinder takes about 7.5 litres. I feel concerned about using this oil in an expensive vehicle with a camchain that is known for having issues.

Prior to my purchase the P/Finder had full Nissan history and had been serviced every 18k. Thankfully it was 90% Highway ( round the M25 from Crawley to Dartford )

I had thought about a bypass but then thought that as Nissan say it can do 18k.on.the 5w30 C3 then I should have no issues running a good C3 oil.up to 10k. The miles it does now are more half and half city/highway.

I also run a Yamaha X Max 250 and Volvo V50 2.0 D estate but that is for another thread.

I must admit though that 5w30 oil is very common in the UK. My Volvo.uses it (basically a Ford engine) in A1/B1 or A5/B5 spec and my previous Mondeo 2005 and also diesel used the same oil.specs. I changed the oil at 7/8000 intervals witha Ford filter and that car now has over 200k on it and is run by a friend. The earlier Ford diesel engines are camchain and that old Mondeo is original with no major components replaced other than one alternator at 190k. So I have a lot of faith in Ford oil specs and 5w30 inparticular.

I am interested in what forum members have to say. Though filters are not as varied in the UK. But I tend to go for decent quality ones such as Hengst amd Bosch. Unless it is a paper element then I go to the original manufacturer ones from a dealer.

My intentions are to minimise the common camchain issues on the Pathfinder and run it up to 300k at least over the next 10 yrs. The Taxi I hope to get 500k out of the engine before jt needs a rebuild. The engine has been in Taxis since late 2006 so not many have gone past 200k. A lot have serious bottom end problems before 140k. In all honesty mine runs very well at almost 170k.

Aorry for the long post. And thanks in advamce for any hints and tips. I must admit using Amsoil products does interest me. As does using better/long.life oil filters.
 
Got four sample kits from Blackstone today.

Will sampling the Pathfinder prior to oil.change from Carlube 5w30 to Castrol Edge 5w30

There will be around 7000miles on this oil and almost 105k on the engine.

Should be an informative start. And hopefully a good baseline to start building some data.
 
Seems like you are pushing the limits of the oil, which is fine but glad to see you are going to sample the oil. Should be some good info. BTW I do not think the Nissan Titan or Pathfinder has a diesel in the US. If I had to guess, 98% of passenger cars and 1/2 ton and under trucks are gas.
 
Originally Posted By: Barkleymut
Seems like you are pushing the limits of the oil, which is fine but glad to see you are going to sample the oil. Should be some good info. BTW I do not think the Nissan Titan or Pathfinder has a diesel in the US. If I had to guess, 98% of passenger cars and 1/2 ton and under trucks are gas.


Correct... Sadly enough, that powertrain isn't available here.
 
Welcome to the forum. Best to use a separate post per vehicle. And include some info in the title. B/S is OK for UOA, but ignore their useless comments. Make sure you get a TBN which I think costs extra. I use Polaris and feel they are a better lab, but just my opinion.
 
Thanks for the pointers. Only read on Forum that the Titan could be had with a diesel lump not much info on US vehicles in the UK.

The engine is good for towing but due to egr, dpf and Euro emissions targets will only average 22mpg!!

At that economy level I would rather have the 4.0 as then I could have more fun and put on LPG for economy.

I will start a new thread for the Taxi and post back my results from the UOA when I get it.

I shall also try to locate the US specs for the oil I am using as I think it may make things a bit clearer.

I am going to go for TBN. Nothing mentioned in the sample kit about extra cost. Just the price of $25. Which seems reasonable.

Any previous Blackstone customers know how.much extra TBN is?

Pity I hadn't seen this forum.earlier as the oil I pulled at 98k was in there since 84k. But only four months from Feb to May.

Engine is quiet and has not used any oil since I bought it. It had done 91k when I bought it. Just a tiny bit of injector rattle which is very common on these.

Once again thanks for all and any comments they are all welcome.
 
Thanks for the link.

That oil would certainly meet the specs for the Taxi.

I live near Thurrock which has a number of places specialising in servicing and parts for large commercial vehicles. I shall have a look next week to see if I can source that oil and what kind of price it is.

Managed to get 10litres of 10w40 Maxlife Synthetic Blend for £48 via an online sale at EuroCarParts. It usually retails for £34:95 for five litres!!

From prices and comments on the forum you can claim rebates etc on oil. I can only wish for FAR.
 
If you have a choice of oil viscosity ranges then always choose the 0/40 in preference to a 10/40, as it will give better cold start protection.
It is often hard to find an oil filter that is as good as the one used by the manufacturer, so unless you have fully researched the subject in terms of the performance of an equivalent filter I would recommend paying the extra for a manufacturers oil filter.
In terms of the recommended OCI, a taxi has a very hard life so if you want the engine to last as long as possible I would recommend changing oil twice as often as the normal service interval.
If the engine is in good condition there is no need to change the oil filter more often than recommended, so if the normal service interval is 10,000 miles, then I would change oil only at 5,500 miles and then again 4,500 miles later along with the oil filter. Those figures will allow for the oil left behind in the filter.
In terms of oil type, using part synthetics is a waste of money as all they are is dino oil with some more additives. You should either go for a major brand full synthetic, or a major brand dino oil that has a good reputation if you don't want to use an expensive oil. If you do decide on a dino try a 5/40 not a 15/40 truck oil.
There will be very little difference between the different oil brands in UOA result terms, but the choice of oil filter, viscosity and OCI or FCI are of concern and the decision over full synthetic or dino oil is also of interest.
Once you get the figures from Blackstones (The TBN is 10 usd extra and I would not want to see a figure less than 3 for severe service use), then you can decide if the initial double oil change interval can be extended, but time at idle and multiple stop starts are tough on the oil.
Oil has a long shelf life, so it might be cheaper to buy 20 ltr cans if you are doing more than one oil change per year and obviously if you can find an oil that suites both engines it would help from that point of view.
 
In my current situation the only two vehicles that can use similar oils is the Clio and the Taxi. Volvo and Pathfinder take 5w30 but one is a C3 and one is a B1/B5. Since my Volvo is one of the last without a DPF.

I had considered leaving the oil filter in situ on the cab and doing shprt changes. Especially with the avaiability of Chevron Supreme 10w40.

The maxlife was bought after reading the forum and to see if it will help the minor oil leakage. But the price of Maxlife puts it above Mobil 1 by £5 unless bought online at sale time.

As you suggest if I run the taxi and clio on Mobil 1 it will make things easier.

But I would like to see how long it is safe to run a decent oil in the taxi. I can buy an Amsoil bypass kit in the UK but it is around three times the price of retail in the US. When you co.sider the discounts after being a preferred customer or dealer then the profit margin seems to be more criminal profiteering than good business.


I always use OE spec filters. Sometimes branded ( ie Renault) but I prefer to use German made filters such as Hengst and Bosch when.possible though the Clio got a Mann filter this time around, but still German made.

Carlube 5w30 C3 will be coming out the Pathfinder this week after 7k miles. With a Nissan filter.

Will be replaced with Castrol Edge 5w30 C3 with a Hengst filter. Both times the air filter was changed due to lots of use in London. Only addition this time is I am changing the fuel filter aswell.

I suppose the simplest thing would just be to use the 18k mile interval specified by Nissan UK. But with proper data from UOA I would like to try and see if that is actually a good idea with my usage.

If the data supports a longer OCI then I can't complain.

If I can safely increase the OCI on the taxi I shall do so aswell. 2010 onwards models have a 12k instead of the earlier 10k interval. With no difference in oil specs, filter or engine.

I will print up results as they become available. Maybe with bypass I can increase to 20k. Perhaps with Mobil 1 or Amsoil this will be possible.

I am still learning. And the my initial confusion over Grp 11 and grp111 oils and PAO etc will hopefully slowly clear.

I appear to have been innocently thinking that Semi Synthetic was just that and Fully Synthetic was just that. I can see that a synthetic blend may co.tain a smaller amount of synthetic than semi perhaps.

But my knowledge of what makes up oils chemically is a little bit beyond me at the moment. Especially as I last studied chemistry in the early eighties at school!

Once again thanks for all comments. They are all helpful in some way.

I hope some of my UOA results and usage are helpful to others.

From reading your previous postings over the last few months I think you have one of the V40 diesel Volvo's. That Renault sourced engine was also in the 440/460 from memory. A friend had one that did huge mileages on any 10w40 he could find. I sold him a 19 Chamade RTdt (93 L reg) with similar engine and that was again very reliable.

When time comes to change cars. Consider the newer V50. The Ford sourced engine is a solid one. And the interior is comfy and well built. Not sure I agree with the 150k miles cambelt interval though.
 
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