I bought my 2012 focus zetec s (1.6) last year and it only had 6 services but low-ish mileage (48k). Since ive owned it i have been doing frequent oil changes and am going to do my next one in a week or so. It will have been 6 months since last change and been quite far. I was wondering if i should use some engine flush when i change my oil. I have ford 5w-20 to put in. I have seen wynns engine flush and dont know if it will increase or decrease performance. My oil always comes out clean.

I wouldn't, if there are any hard baked on deposits then loosening them off is more likely to do more harm than good.

Keep changing your oil as you have done and your Engine should have a long trouble free life.

37 minutes ago, Jacob9234 said:

My oil always comes out clean.

Sounds like it doesn't need changing so often.

Once a year is fine for average mileage, around 10-12k.

I wouldn't bother with engine flush either.

16 hours ago, TomsFocus said:

Sounds like it doesn't need changing so often.

Once a year is fine for average mileage, around 10-12k.

I wouldn't bother with engine flush either.

i know it sounds stupid but due to the little services it had before my ownership im sorta trying to make up for it haha. Also trying to get out all the crap built up over the years if there is any. Ive never had an engine problem. It seems to be indestructible. 

If you're going to get any problems with this engine, it'll be to do with the coolant, not the oil.  

The coolant should have been changed at 10 years old, along with the cambelt, so hopefully they've been done now.  I'd be far more concerned about those than the oil on this engine.

I thought all decent engine oils were detergent oils so no need to flush

before leaping at 5 20 whats the manual say? at 48k and 6 services the insides should look like brand new

many 20 weight oils are for modern rubbish, where the rest of the car will die soon, so engine longevity is outweighed by saving's achieved getting reduced fuel consumption - these later oils changed whats in there from HIGH SAPS to LOW or MID SAPS... but engine parts, materials and clearances also evolved to suit engines designed to operate with low and mid SAPS oils

you need oil meeting the specs the owners manual states - which if a mk2.5 I guess will be a A3 5W30 ? - unless u have a mk3 and its probably halfway dead and not worth worrying about anyway.....

there are lots of others these days (A7 and C5 and C6 etc.) but for newer stuff

 

ACEA A3/B4 Stable, stay-in-grade Engine Oil intended for use in Passenger Car & Light Duty Van Gasoline & DI Diesel Engines, but also suitable for applications described under A3/B3.

ACEA A5/B5 Stable, stay-in-grade Engine Oil intended for use at extended Drain Intervals in Passenger Car & Light Duty Van Gasoline & Diesel Engines designed to be capable of using Low Viscosity Oils with HTHS Viscosity of 2.9 to 3.5 mPa*s. These Oils are unsuitable for use in certain Engines - consult vehicle-OEM’s owner’s manual/handbook in case of doubt.

ACEA C3 Stable, stay-in-grade Engine Oil with Mid SAPS-Level, intended for use as catalyst compatible Oil at extended Drain Intervals in Vehicles with all Types of modern Aftertreatment Systems and High Performance Passenger Car & Light Duty Van Gasoline & DI Diesel Engines that are designed to be capable of using Oils with a minimum HTHS Viscosity of 3.5 mPa*s.

ACEA C4 Stable, stay-in-grade Engine Oil with Low SAPS-Level, intended for use as catalyst compatible Oil at extended Drain Intervals in Vehicles with all Types of modern Aftertreatment Systems and High Performance Passenger Car & Light Duty Van Gasoline & DI Diesel Engines that are designed to be capable of using Oils with a minimum HTHS Viscosity of 3.5 mPa*s.

 

https://www.oilspecifications.org/acea.php

 

 

 

 

Engine flush can do more harm than good.  Regular oil changes and engine shouldn't have any build up of deposits.  Flush can unsettle deposits and block oil channels, etc.  If it ain't broke and all that.

On 9/3/2024 at 9:53 AM, TomsFocus said:

If you're going to get any problems with this engine, it'll be to do with the coolant, not the oil.  

The coolant should have been changed at 10 years old, along with the cambelt, so hopefully they've been done now.  I'd be far more concerned about those than the oil on this engine.

cambelt and waterpump was done before i bought the car but i got it again changed for peace of mind because there was no record of it.

On 9/4/2024 at 6:06 PM, Botus said:

before leaping at 5 20 whats the manual say? at 48k and 6 services the insides should look like brand new

many 20 weight oils are for modern rubbish, where the rest of the car will die soon, so engine longevity is outweighed by saving's achieved getting reduced fuel consumption - these later oils changed whats in there from HIGH SAPS to LOW or MID SAPS... but engine parts, materials and clearances also evolved to suit engines designed to operate with low and mid SAPS oils

you need oil meeting the specs the owners manual states - which if a mk2.5 I guess will be a A3 5W30 ? - unless u have a mk3 and its probably halfway dead and not worth worrying about anyway.....

there are lots of others these days (A7 and C5 and C6 etc.) but for newer stuff

 

ACEA A3/B4 Stable, stay-in-grade Engine Oil intended for use in Passenger Car & Light Duty Van Gasoline & DI Diesel Engines, but also suitable for applications described under A3/B3.

ACEA A5/B5 Stable, stay-in-grade Engine Oil intended for use at extended Drain Intervals in Passenger Car & Light Duty Van Gasoline & Diesel Engines designed to be capable of using Low Viscosity Oils with HTHS Viscosity of 2.9 to 3.5 mPa*s. These Oils are unsuitable for use in certain Engines - consult vehicle-OEM’s owner’s manual/handbook in case of doubt.

ACEA C3 Stable, stay-in-grade Engine Oil with Mid SAPS-Level, intended for use as catalyst compatible Oil at extended Drain Intervals in Vehicles with all Types of modern Aftertreatment Systems and High Performance Passenger Car & Light Duty Van Gasoline & DI Diesel Engines that are designed to be capable of using Oils with a minimum HTHS Viscosity of 3.5 mPa*s.

ACEA C4 Stable, stay-in-grade Engine Oil with Low SAPS-Level, intended for use as catalyst compatible Oil at extended Drain Intervals in Vehicles with all Types of modern Aftertreatment Systems and High Performance Passenger Car & Light Duty Van Gasoline & DI Diesel Engines that are designed to be capable of using Oils with a minimum HTHS Viscosity of 3.5 mPa*s.

 

https://www.oilspecifications.org/acea.php

 

 

 

 

Manual says 5w20 and 5w30 as a substitute.