This oil completely stopped the cold start surging on my 2000 7.3 Powerstroke F350, even at below zero without being plugged in...(I am often out of town where I cannot plug in). With regular 15w40 RotellaT, it would not start at all below about 25 degF unless plugged in. With the Rotella T6 5w40 synthetic, it starts, even below zero, without being plugged in....and no surging at all. I assure you I am not employed by Shell or Rotella, I just love this oil. I only run it in the winter though, with 190,000 miles on my truck, I figure the regular Rotella is good enough for summer...as you know the synthetic Rotella gets expensive when you are buying 4 gallons.

Rotella t is one of the best diesel oils ever. And Walmart has the best prices on it AND they will deliver it to the house? Critical for someone like me who has disabilities. Walmart's delivery service is more than a convenience, it is a lifeline for those with disabilities.

Just bought a 2002 Kawasaki Concours motorcycle and the previous owner swears by this oil. Did some extensive research and online Concours forums questioning, this is THE stuff for improved cold starts, better shifting, and overall performance. Try buying full synthetic from motorcycle shop for anywhere near what Walmart is charging for this oil!

I have used this in both my 1997 f250 7.3 and my 2005 f250 6.0 with no adverse issues at all. Best level of oil for the price before you start considering the Amsoils and Redlines that cost double. As long as your sticking to a routine schedule of changing the oil and filter, the Shell T6 will do more than its part in taking care of your engine and its internals. If your trying to go over 10k miles in between oil changes step up to the top of the line oils and pay the premium, but thats on you. Use genuine Ford filters with this and your golden. But i cant stress this enough, stick to routine maintenance intervals for your truck and they will last you hundreds of thousands of miles. Also always compare between walmart and amazon cause they go back and forth in who has the cheaper prices.

This oil is made for hot running engines and we know what heat does to things. Many Harley Davidson riders have gone to this because it has all the protection that an air cooled engine needs. We all know how many miles a diesel truck puts on the road while delivering across the nation and how many times we have sat behind one waiting. Heat is the enemy of oil and keeping the engine parts slick is long life for the engine. When you start that engine for the first time in the morning it has parts that need to be coated and slick... that's where Rotella comes in and it adjusts through the day's temperature and the season temperature. Engine manufactures have determined that it should be changed at or around the 5,000 mile mark.

As a 6.7 cummins owner that hauls a 12,000lb 5th wheel I trust my Ram to get me where I want to go and not worry about my motor. I have used nothing but Rotella T6 and will let my consumption guage get to 15% life left before I change the oil and filter. After driving 7,000 miles and changing it I could still feel the heaviness to the oil so I know this oil isn't breaking down prematurely. I won't trust my engine to anything but this oil

I have a Kawasaki 1500, model year 2000. I switched to this oil because someone with a similar motorcycle tried it and liked it. Major reason for me switching to this is because it was a full synthetic and very reasonably priced compared to other full synthetic motorcycle oils. I've put on 2000 miles since my oil change and I have started to notice severe clutch slippage. At first it was barely noticeable but as of right now, I have a hard time getting on the interstate without it slipping. Now, whether it is due to the recent oil change or some other Factor, I'm not sure if I would recommend this oil for anyone to use in a wet clutch motorcycle or not.

I have 146000 on my f350 recently replaced all the injectors, when we pulled the valve covers off I was impressed they looked like new no sludge or anything. I remember 40 years ago my father in law told me to use shell Rotella if you want a clean engine. He was right.

I think that this one of the best oils on the market for trucks like mine as well as all of the new ones being built today. Why should we not use all of the newer oils to make our older Diesels last longer, if they help the new trucks, they should really help our older trucks that have some age on them and are still being used every day, for work, pleasure driving an just to have around. Mine has 268000 miles on it and I hope to put a Million Miles on it, if I live that long.

I am using this in my new John Deere tractor. It flows well in winter making cold starts easy. It’s is resistant to thermal breakdown as I have had this oil in my tractor long enough to see oil consumption is virtually non existent. You spend. Lot of money for a diesel so you want to make darn sure it hold up to hard use can throw at it; even with that, the oil has not changed color. Durability and longevity is what I want in my investment and Rotella will take me there!