Just wondering what some of your feelings are about using full synthetic oil in a turbo diesel engine. I have been using Castrol Syntech for over 15 years in all the Toyotas I have driven, well over 600,00 miles. I have been hearing some good things about Amsoil, don't have any personal friends who have used it yet, so I don't have any direct feedback ontheir product. Any and all comments are welcome and appreciated greatly!

The subject ENGINE OIL is likely to result in a few objections from people that are against talk on this board.
I suggest you use the search button, enter "Synthetic" and see what you find. There is lots of info and talk on the subject (including things like Oh No! Not another Oil Thread...." )

That said, I use synthetic in my engines with tight rings, especially my '87 300D turbo (OM603 engine) which has hydraulic lifters that tend to plug if Dino oil is used, and in my '85 300TD which has a newly rebuilt engine. I use Amsoil exclusively now that they sell it in 2.5 gallon jugs.
I did not see what vehicle(s) you drive so can't comment directly on your cars.
If you have lots of blow by or are losing oil in a car then using synthetic is probably a waste, unless its cold weather then synthetic is what you need for those deep winter starts.
Dieseldiehard

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!

Thanks for the response, sorry to irritate those who have been on here for a while.

If you will read the ' sticky ' at the top about ' using the search' it will help... you will find better info because people are not going to type the same answer a 100 times on a site which has a good search feature.... so if you don't use the search and it is something most people know has already been answered then you just don't get good info....or only the people with ' far out' ideas who want converts will be the ones who do reply... because they were laughed out of the real oil threads..... LOL

We haven't had a good oil war in a long time, and the forum has been really boring lately. So if you don't mind your email inbox filling up with reply notices, we could start one up here.

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Rick Miley
2014 Tesla Model S
2018 Tesla Model 3
2017 Nissan LEAF
Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro
Chain Elongation References

I don't understand the comment, who did you irritate? Not dieseldiehard or myself. I do suggest you use the search mode for finding general info, then asking specific questions.

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'10 Chrysler T&C Stow-N-Go White. Grandpa's ride.

'13 Chrysler 200 Touring Candy Red. Grandma's ride.

Age and cunning will always over come youth and vigor.

"irritate" isn't quite the right word here.
More like "entertain"
The oil debates here have become rather endless, and eventually pointless. So us "old timers" have an unwritten agreement to just agree to disagree on the subject. But yes, do a search, and read away on the subject to your hearst content.

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past MB rides:
'68 220D
'68 220D(another one)
'67 230
'84 SD
Current rides:
'06 Lexus RX330
'93 Ford F-250
'96 Corvette
'99 Polaris 700 RMK sled
2011 Polaris Assault
'86 Yamaha TT350(good 'ol thumper)

I know one thing 603's love Mobil 1 15w-50. Not that dino crap.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200

Switched my 240D over to Mobil Delvac 1 at 143,000 miles and it just purred like a kitten. Changed again at 147,000 and used Mobil 1 15W-50 for the long hot summer, I'm changing early to get more of of the PO non sysnthetic oil out of the engine. I'll change it again in late September then switch back to Delvac 1 or it's twin Mobil 1 Truck & SUV oil.

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'10 Chrysler T&C Stow-N-Go White. Grandpa's ride.

'13 Chrysler 200 Touring Candy Red. Grandma's ride.

Age and cunning will always over come youth and vigor.

Excellent work guys - we are well on our way to another oil thread.

I use Amsoil in all my cars and it has done wonders for all of them. Their products are excellent. I use their synthetic fluids bumper to bumper in most of my cars. The 300SD is the only exception, but I'll get to it soon enough - right now I just use Amsoil for its engine. Other than the cars starting much faster and sounding much quieter, I have been enjoying much improved fuel economy since switching over to Amsoil, as well as extended drain intervals, fully supported by oil analysis. Now my Mazda gets 4 mpg more in combined driving, the Corolla 3 mpg, the Avalon 1.5 mpg, and unfortunately no improvement on the BMW. I just started using the Amsoil 15W-40 Heavy Duty Diesel oil 300 miles ago, so it is too early to check for any improvement in gas mileage.

I definitely recommend it fully!!

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1999 Mercedes-Benz S600, 103K miles - garage queen
1988 Mercedes-Benz 560SEL, 89K miles - daily driver
2007 Hyundai Sonata Limited, 31K - daily driver

Delo 400!!! :p :p

Amsoil!!! :p :p

Mobil 1 forever.

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'10 Chrysler T&C Stow-N-Go White. Grandpa's ride.

'13 Chrysler 200 Touring Candy Red. Grandma's ride.

Age and cunning will always over come youth and vigor.

My Bora got only and will only get Mobil delvac 1 synthetique (110K Km so far )
Just switched the 300 sd to synthetique and the car runs smoother (414K Km and counting)
so far no oil consomption or oil loss....

I'm kinder cornfused ... by this thread.

I couldn't use Mobil 1 in my Powerstroke Diesel because it didn't meet Navistar's anti-scuffing spec. This protects the piston rings and cylinder walls for such long-stroke engines. I had to use Delvac, Delo, or Amsoil.

Don't our Benz diesels require a similar anti-scuffing specification? If I remember right it's called CH-4.

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Thx/Reno
An American in France
88 300TD 5spd Sportline (lowered factory susp) - totalled by a flying deer
89 Range Rover V8 - the 4wd beast
02 Toyota minivan
05 Peugeot Partner 4x4 Dangel
88 International Harvestor 633SA
--Gone but not forgotten:
1970 250/8 C (sold to buy 450 SLC)
1972 450 SLC (sold after battling wiring harness problems too long)
1971 300 SEL 6.3 (sold after destroying two *very* expensive rear LS diffs)
1986 560 SEL (now my little brother's pride and joy)

Synthetic Delvac 1, Mobil 1 for truck & SUV's (both the same oil, just different package), and I believe Mobil 1 15W-50 are all CH-4 or better.

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'10 Chrysler T&C Stow-N-Go White. Grandpa's ride.

'13 Chrysler 200 Touring Candy Red. Grandma's ride.

Age and cunning will always over come youth and vigor.