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#4808756 - 07/09/18 12:51 AM 93 Ford F-350 Turbo Diesel
docsuess84 Offline

Registered: 05/04/12
Posts: 5
Loc: Redding, CA
Hey everyone, we recently picked up a 93 F-350 work truck and Iím trying to decide what oil to run in it. I normally follow the manufacturer specs but Iím not sure what to make of it. It calls for SAE 30 oil rated CF-4/SG. SG is apparently a defunked rating. Would I just run something like Delo 500 30 weight or Rotella? Or is the manufacture recommendation so out of date it doesnít matter anymore? Thanks. This thing has a quarter million miles on it already and I want to keep it running. Oh I plan on following the recommended 5000 mile OCI.

#4808767 - 07/09/18 02:24 AM Re: 93 Ford F-350 Turbo Diesel [Re: docsuess84]
CleverUserName Offline

Registered: 11/08/17
Posts: 193
Loc: California
It's a '93 Turbo IDI. Those are kinda rare, good find.

You can use any 10w30 or SAE 30 in CI-4+. This is pre diesel emissions spec for your truck. It will give you lots of zinc and calcium if you want to push the OCI over 5K.

It gets really freakin hot in Redding, CA so maybe you want to use a 15w40 or 5w40 synthetic, I would if I was towing or doing any hauling in that heat. Those are also suitable for winter use in your climate. Lots of conventional and synthetic CI-4+ or CJ-4/CK-4 options in the 40 wt viscosities to choose from.

#4808809 - 07/09/18 05:58 AM Re: 93 Ford F-350 Turbo Diesel [Re: docsuess84]
bullwinkle Offline

Registered: 10/09/04
Posts: 7719
Loc: Cincinnati, OH, USA
I run Delo 400 SAE 30 in my '89. but any major brand HDEO 15W40 (or 10W30) would work fine. The bigger (potential) issue with your truck will be coolant additives, called SCAs, which prevent destructive cavitation of the thin cylinder walls. I did a lot of research on SCAs when I bought my 7.3, and I settled on the DCA-2 type, made by NAPA (NAPA Kool) and others, with a coolant filter plumbed between the heater hoses to catch the silicate drop out (which will settle in the bottom radiator tank otherwise).
06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 15 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)

#4808837 - 07/09/18 07:10 AM Re: 93 Ford F-350 Turbo Diesel [Re: docsuess84]
Chris142 Online   content

Registered: 06/05/03
Posts: 16946
Loc: Deplorable in apple valley, ca
Most people including me run a 15w40. For some reason they don't like rotella,tend to burn it.
02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40

#4808883 - 07/09/18 08:18 AM Re: 93 Ford F-350 Turbo Diesel [Re: docsuess84]
racin4ds Offline

Registered: 05/07/10
Posts: 1020
Loc: Ocala, Florida
Yep, any decent 15W40 diesel rated oil will work fine in that dinosaur. They weren't picky and with your climate no reason to run anything for cold start up.

Rotella makes a fine oil as does Delo. Either one can be had at WalMart on the cheap.
Just say NO to thin oils and M1!
05 F350 Powerstroke
05 Hyundai Tucson
08 Legacy GT
2008 Kawasaki Ninja 650R

#4808931 - 07/09/18 09:13 AM Re: 93 Ford F-350 Turbo Diesel [Re: docsuess84]
CT8 Offline

Registered: 10/09/14
Posts: 11210
Loc: Idaho
I lived in Palo Cedro for 17 years and 15W- 40 oil is perfect. 5W-40 is a waste of money until you get below 20*f consistently. I will say the 15w 40s are a better oil
"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

#4808975 - 07/09/18 10:00 AM Re: 93 Ford F-350 Turbo Diesel [Re: docsuess84]
docsuess84 Offline

Registered: 05/04/12
Posts: 5
Loc: Redding, CA
Awesome. Thanks for the tips. It is primarily used for towing a dump trailer and it is indeed ridiculously hot right now.

#4809267 - 07/09/18 01:59 PM Re: 93 Ford F-350 Turbo Diesel [Re: Chris142]
jongies3 Offline

Registered: 03/11/16
Posts: 839
Loc: MT
Originally Posted By: Chris142
Most people including me run a 15w40. For some reason they don't like rotella,tend to burn it.

Must be an IDI thing because my 1997 7.3 Powerstroke loves Rotella T6, it leaks a little but not much, rarely have to add any makeup oil.
2004 Toyota Tacoma 3.4 V6: Mobil 1 AFE 0W-30, FRAM TG-3600 filter
1996 Ford Contour 2.5 V6 QSGB 5W-30, MC FL-500S filter