Go to oil for 2.7

[bulldogdad02]

What oil do you all recommend for the 2.7 engines with the oil wet belt system.
Price doesn’t matter. I want to make sure I use the best there is for it. So wanting to see what your alls go to oil is. Before I change mine.

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[superj]

Mobil 1, royal purple, any name brand, really, as long as it meets the spec ford calls for

 

[bgn]

Oil either meets spec or it doesn't. The rest is you paying them to market to you.

I'll likely run Kirkland Signature full synthetic.

 

[stuartmunto]

I just run any fully synthetic oil that meets ford’s spec

 

[AugPal]

I don't know why Ford still uses a wet belt system. I know it only powers the oil pump and is not part of the timing chain anymore. How that improves fuel economy is beyond me.

 

[josephp732]

For the Ford 2.7L EcoBoost with its wet timing belt system, using an oil that meets Ford's specified viscosity and performance standards is critical for both engine durability and belt longevity.

The wet belt operates while immersed in engine oil, so the oil's chemistry directly affects the belt material over time. A high-quality PAO-based full synthetic oil provides excellent oxidation resistance, deposit control, and long-term viscosity stability while remaining compatible with modern engine seals and wet belt materials.

In contrast, a heavier ester-based formulation may not offer the same balance of wet-belt compatibility that a premium PAO-based oil provides.

For long-term ownership of a Ford wet-belt engine, using the correct Ford-approved viscosity and specification in a high-quality PAO synthetic oil is one of the best ways to promote timing belt longevity and overall engine reliability.

 

[TurboRanger]

Pennzoil Ultra Platinum™ Full Synthetic Motor Oil
This out performed Amzoil
https://www.pennzoil.com/en_us/products/full-synthetic-motor-oils/pennzoil-ultra-platinum.html

 

[Roguescholar]

My preference is Pennzoil Ultra Platinum. It uses a very robust additives package and it's natural gas derived base oil provides really good shear stability and resistance to fuel dilution, both of which are critical for protecting the engine’s wet belt. Highly boosted, direct-injectioned engines like the 2.7 EcoBoost naturally suffer from raw fuel washing into the crankcase. Because of this it's a good idea to use an oil that's formulated to resist thinning and maintain it's viscosity when exposed to small amounts of raw fuel over time. This helps prevent the rubber belt from breaking down prematurely. It also meets Ford's WSS-M2C961-A1 specification.

That being said, there are a lot of good oils out there and while some synthetic oils are better formulated than others, as long as the oil meets Ford's WSS-M2C961-A1 specification the bigger factor at play is your mileage / time interval in between oil changes rather than the oil itself.

 

[hand-filer]

Pennzoil Ultra Platinum 5W-30 in the 2.7. Pennzoil Platinum Euro 5W-40 in the 5.0. I've used this oil for many years with excellent results.
I recently stocked up on Mobil 1 ESP 0W-30. This is also a very good PAO base stock oil with a robust additive package.

 

[bigb]

Another vote for Penzoil Ultra full synthetic, I've seen two tests where it came out at the top of the pile, one by the Oil Geek and another by an independent tester.

 

[evance]

Another vote for Pennzoil Ultra Platinum 5W-30. They are running a rebate as well right now for the DIY oil change. Buy two 5qt jugs and get a $30 Visa card rebate.
https://www.pennzoil.com/en_us/promotions/do-it-yourself-oil-change/rewards.html

 

[TurboRanger]

You can find Pennzoil Ultra Platinum 5W-30 at Wallymart for almost 1/2 price

 

[Roguescholar]

I don't know why Ford still uses a wet belt system. I know it only powers the oil pump and is not part of the timing chain anymore. How that improves fuel economy is beyond me.

It’s because the belt is lubricated. Having the belt lubricated, as opposed to running dry in open air, reduces friction by about 30%. That translates to roughly a 1% improvement in fuel economy.

Given the potential downsides, I’m not sure that design is worth it, considering that a 1% improvement in fuel economy only saves about two and a half tanks worth of gas over 100,000 miles, but regardless those are the numbers.

 

[stemplar]

Pennzoil Ultra Platinum™ Full Synthetic Motor Oil
This out performed Amzoil
https://www.pennzoil.com/en_us/products/full-synthetic-motor-oils/pennzoil-ultra-platinum.html

I’m curious what the source of your assertion is? I just googled trying to find it and the tests I found actually came to the opposite conclusion. I’m not arguing one way or the other; just looking for your source.

 

[stemplar]

For the Ford 2.7L EcoBoost with its wet timing belt system, using an oil that meets Ford's specified viscosity and performance standards is critical for both engine durability and belt longevity.

The wet belt operates while immersed in engine oil, so the oil's chemistry directly affects the belt material over time. A high-quality PAO-based full synthetic oil provides excellent oxidation resistance, deposit control, and long-term viscosity stability while remaining compatible with modern engine seals and wet belt materials.

In contrast, a heavier ester-based formulation may not offer the same balance of wet-belt compatibility that a premium PAO-based oil provides.

For long-term ownership of a Ford wet-belt engine, using the correct Ford-approved viscosity and specification in a high-quality PAO synthetic oil is one of the best ways to promote timing belt longevity and overall engine reliability.

This is good information! What isn’t mentioned are Group III bases, perhaps because they’re technically not synthetic like PAO or Ester bases, but can be refined to the point of being called “synthetic” (at least here in the US, where synthetic has largely been reduced to a marketing term). Group III are cheaper, have additive compatibility similar to the PAO’s, but lack the chemical stability of true synthetics. A very popular Group III oil is Pennzoil “synthetic”.

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