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[megakid]

Don't mix oil brands. It's not worth the risk.

You might get away with it if they're both the same oil types (synthetic, viscosity etc) but I'd still say don't risk it.

 

[poker_999]

Its safe to drop it in if its also 5/30.

But I would source some castrol.

 

[pepsilol]

Is it 5w30 ?

If so you will be fine.

Far too much is made of oil nowadays.

 

[cwhitehead]

Is it 5w30 ?

If so you will be fine.

Far too much is made of oil nowadays.

This, unless doing track days its not important especially mixing only that much.

 

[Matt82]

Don't mix oil brands. It's not worth the risk.

what risks are involved in this?

 

[[TW]Fox]

Castrol oil isn't expensive, do it properly.

 

[GeX]

So take it back and just use the same. It is 'probably' fine - but why even mix it.

 

[Firestar_3x]

Is it 5w30 ?

If so you will be fine.

Far too much is made of oil nowadays.

Please furnish us with your expertise in the subject.

Explain to me the difference between Halfords own brand 5w30 and Castrol Edge 5w30.

 

[Philz0r]

Think wilkos is selling the 4littre castrol 5w30 for £13 or £16 atm. Cant remember which.

 

[Burnsy2023]

Explain to me the difference between Halfords own brand 5w30 and Castrol Edge 5w30.

The marketing

 

[poker_999]

castrol has ANTI SLUDGE FOAMING AGENTS...

honestly though buy a cheap **** oil and some reasonable quality castrol gtx of the same viscosity and feel both with your fingers. The castrol even feels and smells of a higher quality

 

[[TW]Fox]

?

The price of it isnt the concern.

So pop back and get the right stuff

 

[poker_999]

check if you even need any more oil, haynes arnt always 100% on fluid capacity

 

[Burnsy2023]

Well done einstein

He answered your question. What more do you want?

 

[Firestar_3x]

The marketing

If only oilman knew this much!

 

[cwhitehead]

oh dear

All engine oils intended for normal road use in recent 4-stroke engines are compatible with one
another, regardless of the base make-up. (mineral, PAO/ester/hydrocracked synthetic, and semisynthetic.)
There is no need to flush or strip down an engine when changing from one type to another.
(…but be careful with the exceptions of castor oil based racing oils and plant based engine oils.)

Synthetic oils produce sludge?

Well honestly, this is just totally daft. All synthetic bases are more resistant to oxidation than mineral
oil, and sludge is largely due to oxidation. In any case, all motor oils intended for road use meet the
higher API specs such as SH, SJ, SL and diesel equivalents. One of the main reasons for introducing
the API specs back in the 1950s was to deal with oil sludge problems. All high-spec oils run very
clean, especially synthetics.

 

[Firestar_3x]

oh dear

All engine oils intended for normal road use in recent 4-stroke engines are compatible with one
another, regardless of the base make-up. (mineral, PAO/ester/hydrocracked synthetic, and semisynthetic.)
There is no need to flush or strip down an engine when changing from one type to another.
(…but be careful with the exceptions of castor oil based racing oils and plant based engine oils.)

Synthetic oils produce sludge?

Well honestly, this is just totally daft. All synthetic bases are more resistant to oxidation than mineral
oil, and sludge is largely due to oxidation. In any case, all motor oils intended for road use meet the
higher API specs such as SH, SJ, SL and diesel equivalents. One of the main reasons for introducing
the API specs back in the 1950s was to deal with oil sludge problems. All high-spec oils run very
clean, especially synthetics.

Nice copy and paste

The point being made isn't one about mixing fully-synth and semi-synth, it's with regards to the formulation of one brand vs the other.