I don't have any experience with Delo 400 XLE 15W40, but I've used the 10W30 XLE and it did a great job. Delo 400 XLE HD SAE 5W-30 is a premium performance synthetic heavy-duty engine oil. It is formulated for engines operating under severe service and a wide range of climatic conditions. Reactions: ronsram , howie12 and Top As I understand this new Delo 400 SDE is formulated for the 2017 diesel engines, and is fully compatible with previous API oils, but i was wondering what those who currently run the Delo 400 LE 15w40 on older their older than 2017 models think? Chevron Delo 400 SDE replaced Chevron Delo 400 LE in order to meet the requirements of the newer API CK-4 specifications. Delo 400 LE SAE 15W-40 is a mixed fleet motor oil recommended for naturally aspirated and turbocharged four-stroke diesel engines and four-stroke gasoline engines in which the API CJ-4 service category and SAE 15W-40 viscosity grade are recommended. ... (Walmart) Delo 400 LE Full Synthetic 5W-40 Oil and Fram Synthetic Oil Filter. Delo 400 can be found for appx $10-/gallon at BiMart on sale (or Rotella, frankly); PureOne $5- on sale. Product Name: Delo 400 XLE HD SAE 10W-40 Reference No: ZE0003901 Issued: 2018-07-04 Version: 1.0 Page 1 of 7 Hazardous Chemical, NON-Dangerous Goods 1. Delo 400 XLE SAE 15W-40 /SAE 10W-30 Delo 400 LE SAE 15W-40 All Diesel Engines Customers wanting improved engine oil performance and protection Delo 400 SDE SAE 15W-40 All Diesel Engines (including the new GHG ‘17 engines) Customers wanting to remain on current API CJ-4 SAE 15W-40 Even with 30,000 - 40,000 mile drain intervals, the use of Delo 400 LE 15W-40 resulted in excellent engine durability and low levels of wear. 72 Year Old Retired Truck Driver and Master Mechanic in Servicing and Maintenance and Maintaining my own vehicles. 3,308 Posts . $15- and still have 3/4 qt remaining for top-offs if necessary. Only 9 left in stock - order soon. The last I checked on this, rotella was the preferred oil. Description. It is formulated for newer engines adapted for stringent emission standards in construction, agriculture, marine and mining applications with SCR, DPF and EGR systems. Delo ® 400 XLE Syn-Blend SAE 10W-30. Advanced Search Cancel Login / Join. Reply. Terms and conditions: *Based on test results vs. API CJ 4 standard for wear and deposits . I've talked with their folks on their Lube-Tek phone number, and they were very helpful. It looks like no one sells Delo 400 LE 15W40 anymore. Thanks :ford: 2002 F-250 4x4 CC SB 7.3 PSD w/4R100. I think that Delo is selling a 400 LE 5W30 synthetic. Delo 400 XLE 10W-30 • Xceptional Lubricant Efficiency Synblends • Up to 28% longer drain intervals versus API CJ-4 • Up to 25% improved low temperature cranking viscosity • Up to 1% improved fuel efficiency • API CK-4, for use in both newer and older diesel engines . I've been looking around for info about the Delo 400 LE 15W40 vs. the new(er) Delo 400 SDE. Delo® 400 XLE SAE 10W-30 with ISOSYN® Advanced Technology is a premium synthetic blend fuel economy and mixed fleet engine oil recommended for naturally aspirated and turbocharged four-stroke diesel engines and four-stroke gasoline engines in which the API CK-4 or SN service category and SAE 10W-30 viscosity grade are recommended. Using the Chevron spec sheets, the zinc concentration in the LE is 0.13% by mass and in the SDE it's 0.08% by mass. It also boasts better low temperature pumpability and flow rate versus SAE 15W-40 oils. Testing of Delo 400 LE 15W-40 showed that the oils reduced level of sulfated ash (vs. similar API CI-4 PLUS oils of the same grade) resulted in substantially less incombustibles in DPF. Jump to Latest Follow Delo® 400 XLE SAE 10W-30 with ISOSYN® Advanced Technology is a premium synthetic blend fuel economy and mixed fleet engine oil recommended for naturally aspirated and turbocharged four-stroke diesel engines and four-stroke gasoline engines in which the API CK4, API SN or API SN PLUS service category and SAE 10W-30 viscosity grade are recommended. Discussion Starter • #1 • Oct 28, 2006. Delo 257004470 400 XLE SAE Synblend Synthetic Blend Oil 15W40. Chevron Delo 400 LE 15w-40 is or was manufactured by Chevron Lubricants. 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