Mixing Formula Shell and Amsoil Oe

[Craddosk]

While I don't anticipate an issue, I'm looking into mixing three litres of Amsoil OE 5w30 with three litres of Formula Shell 5w30. Primary purpose is for cold weather performance, extra protection, and a safety gate if I am unable to change my oil on time. What's the thoughts on this? Amsoil was the cheapest full synthetic I could find in Canada. It was within twenty cents (no shipping, picked up at warehouse) of synthetic oil at Costco at six fifty per litre.

 

[chubbs1]

It should work but if you look at amsoil's site they usually say if you mix their products it negates the extend the drain. I'm sure it will get you 5-6K but I personally would not go past that.

 

[Lethal1ty17]

it will work fine

 

[J. A. Rizzo]

It will probably be fine for at least 7500 miles and probably a lot more, but tell us what your car/engine/driving style/filter are and we can comment further.

 

[CompSyn]

You're good. Amsoil OE is recommended for OEM drain intervals and is not an extended drain oil per say. But it will probably be okay for around 7,500-miles in a majority of applications. Probably should stick with the OEM recommendation though.

Also, on the back of the quart it says: "Compatible with petroleum and synthetic motor oils".

 

[Craddosk]

The engine is the 3.0 Vulcan out of a Ford Taurus.pretty much bulletproof if you take care of it. Driving style is almost all highway, with fifty km a week in city, four hundred km of highway, and sitting for four days. My main reason for the switch is to not be as concerned jefe the car goes six thousand km between oil changes, rather than the standard five thousand km that it currently undergoes.

 

[Craddosk]

Oh, and a relaxed driving style at highway speeds on cruise.

 

[MrMeeks]

My Ford gets 5w-20 petro.based oil in cold weather.
I also run a colder stat (180) all year because
the factory 192 stat. causes heads to crack on
these Ford engines.

 

[CompSyn]

Originally Posted By: Craddosk
The engine is the 3.0 Vulcan out of a Ford Taurus.pretty much bulletproof if you take care of it. Driving style is almost all highway, with fifty km a week in city, four hundred km of highway, and sitting for four days. My main reason for the switch is to not be as concerned jefe the car goes six thousand km between oil changes, rather than the standard five thousand km that it currently undergoes.


With your application (all highway), it'll be no sweat; 6,000km/3,700mi.

10,000km for that matter should be a breeze as long as the engine is mechanically sound and the filters and PCV are up to date...