Another Oil Thread

[RBYM]

What would you guys rather run in your usdm Fiesta ST 1.6l turbo? Castrol MAGNATEC or Castrol Edge 5w30? Currently running the magnatec, thinking of switching to Edge.

 

[WolfDampf]

Oil is oil for me. I grab full synthetic 5w30 changed every 6k

 

[SteveS]

Castrol's online oil selector recommends Edge High Mileage for the Fiesta ST

 

[Intuit]

I guess "high mileage" costs more LoL. At <80k mine is definitely not high mileage.
Been using Castrol the entire time though. BP makes good oil. Had 327k on a previous engine and it was perfectly fine using their dino/mineral (not "high mileage") oil. (lost vehicle due to rust)
Don't know what their additive package is for their gasoline but it stinks and have gotten way less torque out of it, across multiple vehicles in the past. Haven't touched BP gasoline in >10 years LoL...

 

[SteveS]

High Mileage probably costs a dollar or two more in a 5 qt. jug. But the extra detergency of a high mileage oil might not be bad in a DI engine. And the seal conditioners aren't a bad idea in a minimum 6 year old car.

 

[Grsemky]

I'm about to switch to liquimoly from Valvoline, their latest molyglen has some great additives and is API SQ rated... I'll about update in 5k miles

 

[Intuit]

The detergents can make sense. These turbo engines dirty the oil faster than anything I've ever owned prior.
I don't have any evidence of sludge or build-up... though all I can do is peep through the oil fill hole and look at my drain pan.

My (perhaps not valid) concern with prematurely swelling the seals is, reducing their useful lifespan.
(very vaguely related example - https://www.fiestastforum.com/threads/water-intrusion-issue-resolved.23553/post-512426)

Perhaps if I see some evidence of a need for it, I'll consider it. I think I'm just content with the non-mileage labeled product though.
Kind of an "if it ain't broke don't fix it" kind of thinking LoL...

 

[TyphoonFiST]

Im using LiquiMolygen on my next oil change on my Junk yard engine as soon as it goes in.

Molygen New Generation SAE 5W-30 | LIQUI MOLY https://share.google/nBNfdZutWT3yrVcH1

 

[XR650R]

I bought my car new, and did the peloton thing. Glad I did.
Just change it every 5000 with some good full synth.
I tried 5W-30 for 5000 miles. I lost 1 mpg. Went back to 5W-20 because it doesn't get hot here.
Every 5000. Full synth. Full stop.

 

[M-Sport fan]

What would you guys rather run in your usdm Fiesta ST 1.6l turbo? Castrol MAGNATEC or Castrol Edge 5w30? Currently running the magnatec, thinking of switching to Edge.

They are both fine engine oils.

The Magnatec is a lower cost option if that is a factor for you, and will be just fine for <5K OCIs.
The Edge is a more highly additized formula, and might use slightly better base stocks than the Magnatec.
It would probably stand up to DI fuel dilution a bit better, especially if you exceed that 5K miles on changes, but it is what, about $10.00 more per 5 quart/liter jug(??).

 

[SteveS]

Magnatec is $43.99 for a 5 qt. jug at Walmart. Edge is $23.97. Edge High Mileage is $27.48

 

[M-Sport fan]

Magnatec is $43.99 for a 5 qt. jug at Walmart. Edge is $23.97. Edge High Mileage is $27.48

WOW!
I always thought that the Magnatec was less than any of their Edge series (and it was in the past, from what I remember!).
Maybe whatever additive they use in that stuff (titanium? tungsten? and more of it than in the Edge?) skyrocketed in price, hence the crazy difference??

 

[SteveS]

Actually, further research shows that Castrol discontinued Magnatec in 2022. So any remaining stock is apparently being scalped by retailers. It was replaced by the more simply named Castrol Full Synthetic.

 

[rallytaff]

I have only used full synthetic in my car since new. I've used Mobil 1, Castrol Magnatec, Edge and currently High Mileage. All have been 5W20 as recommended. Still runs like clockwork approaching 114,000.

 

[tomsocall]

if you really want to know, how the oil behaves, you should test the old oil in a tribotechnical lab (TTD diagnostics) - and compare it with another one, then you will learn how the viscosity changed, what particles are present etc..

unless you want to go this route, I would shorten the change interval, unless you have a very good reason to put a very high performing oil in the engine, such as racing Millers Oils NT+ etc

 

[M-Sport fan]

if you really want to know, how the oil behaves, you should test the old oil in a tribotechnical lab (TTD diagnostics) - and compare it with another one, then you will learn how the viscosity changed, what particles are present etc..

unless you want to go this route, I would shorten the change interval, unless you have a very good reason to put a very high performing oil in the engine, such as racing Millers Oils NT+ etc

Now that mine is totally out of any warranty whatsoever, I was considering the Millers NT+ CFS in a 0W-30 weight, but just not too sure if it would mitigate any LSPI with it's additive package or not, and being a RACING oil it is not supposed/designed to last for a long(er) OCI.

(I used to run either this, or Red Line 5W-30 in my old Camaro Z28 {5.7 liter, LS1 V-8}).

 

[atlantaM3]

Currently using Costco 5w-30 full synth - change every 5k, all good. Last time I paid $24-ish for 10 quarts of it, since it was on sale. 2x 5 quart containers. Meets all current specs.