When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Rotella T6 full synthetic is also available in 15W-40.
During the summer, in North Carolina, with nearly a half million miles on your engine, that uses oil actuated injectors... I highly recommend moving up to 15W-40 Rotella T6.
Rotella T6 full synthetic is also available in 15W-40.
During the summer, in North Carolina, with nearly a half million miles on your engine, that uses oil actuated injectors... I highly recommend moving up to 15W-40 Rotella T6.
Please explain to me(in detail)why you believe 15 weight to be superior to 0 or 5 weight in warmer climates.
Ford provides a fairly detailed explanation in the form of a chart in the Owner's Manual regarding the relevant relationship between recommended oil viscosity in various ranges of ambient temperatures that can be expected based on regional climates, with a proviso that an adjustment in normal operating recommendations is required if the truck is used for heavy duty towing.
I've taken a page out of Ford's book, and copied it below, with a few annotations added in color:
In response to:
Originally Posted by wpg_250
Please explain to me (in detail) why you believe 15 weight to be superior to 0 or 5 weight in warmer climates.
Originally Posted by joe blow
I would be interested in that explanation as well.
Seems counter intuitive given the operating temps, but hey I am no expert.
Ford provides a fairly detailed explanation in the form of a chart in the Owner's Manual regarding the relevant relationship between recommended oil viscosity in various ranges of ambient temperatures that can be expected based on regional climates, with a proviso that an adjustment in normal operating recommendations is required if the truck is used for heavy duty towing.
I've taken a page out of Ford's book, and copied it below, with a few annotations added in color:
In response to:
Yeah I get that's what Ford recommends, but I've yet to see any posts about blown engines from guys running 0 or 5 w40 weight full synthetic oils even when towing.
40 weight is 40 weight and it only takes a few minutes for oil to reach full operating temperature so I HIGHLY doubt running 0w40 in summer temps has any negative impact on engine wear.
Surprised the OP with 460k miles is asking what oil weight he should be using or said another way, the OP should be sharing with everyone on this forum what oil weight to be using based on his success story.
Having said that, unless OP's truck is new to him or his truck doesn't have the original engine or has been rebuilt.
What is posted above is an old chart. Ford updated it around 2008. Not in time for F-series people to notice in an owners manual, but the E-Series people did (and the 6.0L was still in the E-series through 2010).
Crazy how the old chart is what is always drug up.
I wasn't going to get in on this until an out-of-date chart was posted. Below is the most recent one.
Also - Ford stated that 5W40 is a thicker oil for heavy engine loading and towing.
Basically, that chart got updated when Ford started selling their own label 5W40 oil. I had a link to a Ford video updating the recommendation, but it is no longer public. Now the only source is the '08 and up owners manuals (the one for the E-series diesels and CLEARLY references the 6.0L engine). Ford also HAD the updated chart on the "fcsdChemicalsandLubricants" web page, but due to the age of the 6.0L, it is no longer available either. Only my word on that I guess.
The only valid reasons to use a 15W40 preferentially over a 5W40 would be price and/or the advantage of a slightly slower shearing rate.
I make no bones about my 5W40 preference in HOT S. Texas (even using CK oil not on Ford's approved list), and I back it up with oil analysis results. I know a few people get tired of my posts, but it is 6.0L specific data, and not emotion, driven. I have half as many total engine miles as the OP (245k on mine, and 230k of it on 5W40), but the results speak for themselves. I took this position a long time ago and kept posting about it so I could be accountable if the results turned South, or continue to show good results. Either way, I will keep posting results.
I also found the 2008 Ford Parts and Lubricants catalog (and 2007 diesel standards are specifically mentioned). It is 16MB - POSSIBLY too large to attach.
Page 13 discusses 5W40 oil and I copied and pasted the "Page 13" verbiage below:
Features:
• Motorcraft SAE 5W-40 Full Synthetic Diesel Motor Oil is a high-performance light and
heavy-duty diesel engine oil designed, engineered, and recommended by Ford Motor
Company. It is particularly recommended for use in Ford vehicles equipped with Power Stroke
engines as in truck, bus, construction and other heavy-duty diesel engine applications. It
meets API Service Category CJ-4, required for use in diesel engines designed to meet 2007
on-highway exhaust emission standards and requiring ultralow sulfur diesel fuel. Do not use in
gasoline engines equipped with catalysts.
• Motorcraft® SAE 5W-40 Full Synthetic Diesel Motor Oil is a high-quality diesel engine oil formulated
with synthetic base oils and unique additive technology. It satisfies the warranty requirements of
Ford Motor Company as well as most other domestic and import diesel engine manufacturers.
• Motorcraft® SAE 5W-40 Full Synthetic Diesel Motor Oil is designed for new generation, low
emission diesel engines providing excellent soot control, protection against wear, deposits,
rust and corrosion, foaming, sludge formation, high temperature oxidation and thickening, as
well as protecting exhaust aftertreatment systems such as particulate filters. It also provides
excellent performance in older-generation diesel engines operating on high-sulfur fuel.
• Motorcraft® SAE 5W-40 Full Synthetic Diesel Motor Oil can be used in older engines where the
manufacturer recommended API Categories CD, CF-4, CG-4, CH-4, CI-4 and CI-4plus.
• Motorcraft® SAE 5W-40 Full Synthetic Diesel Motor Oil is recommended for use in Powerstroke®
diesel engines over a wide temperature range, from -20°F (-29°C) to over 100°F (38°C).
• Refer to the SAE 5W-40 Full Synthetic Diesel Motor Oil specification sheet at www.motorcraft.com
and www.fmcdealer.dealerconnection.com for additional information.
For MSDS information call 1-800-448-2063.
Attached is the 2008/9 6.0L Diesel Supplement (Edit - it is for the E-series with the 6.0L) - the oil chart and notations are on Page 46.
NOTE - 5W40 is called a HEAVY oil by Ford, and it or 15W40 is required for towing. This is SPECIFICALLY for a 6.0L.
Verbiage copied and pasted:
• An engine block heater must be used at temperatures below
–10°F (–23°C).
• Use the same engine oil and filter change intervals when using
synthetic engine oil.
• Heavier SAE 15W–40 and SAE 5W–40 engine oils are
recommended for temperature over 50°F (10°C) and must be
used for heavy duty driving and trailer towing.
CH-4 rated 5W40 is acceptable across all temp ranges and loads.
Something like 15 years ago a bunch of guys dug into the International VGT365 specs and confirmed the same. International recommended reducing OCIs by 50% if using newer CJ-4 spec oils in pre-2007 MaxxForce engines and still running old 500ppm LSD, but I don't recall seeing non-red LSD anytime after 2008 so wasn't really an issue. I'm at 175k, at least 125k on CH-4/CJ-4 5W40 and 15ppm ULSD.
Check the build dates on your 2007 model year 6.0s, they're all 2006 engines for emissions back then, because the EPA change was in 2007.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
