Mixing Engine Oil Weights

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SeldomSeen
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Joined: Tue Oct 21, 2008 3:53 pm
Your car is a: 2018 Fiat 124 Spider
Location: Lyons, Colorado

Mixing Engine Oil Weights

Post by SeldomSeen »

I really needed to top off my oil today after tightening a leaking oil pan. My 124 usually gets Castrol GTX 10W-40 but all I had on hand was Castrol GTX 5W-30. Was that a bad idea?
It's never too late to have a happy childhood - Tom Robbins

1972 Alfa Romeo GTV 2000
1966 MGB Roadster
2007 MINI Cooper S
2018 Fiat 124 Spider Classica
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divace73
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Your car is a: 1980 Fiat 124 Spider Silver
Location: Sydney, Australia

Re: Mixing Engine Oil Weights

Post by divace73 »

Just my personal opinion and by no means am I an oil expert but it is better to have a mix in than no oil at all, just do a full oil change sooner rather than later......
Cheers David
-=1980 silver Fiat 124 Spider=-
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htchevyii
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Your car is a: 1982 Spider hers 1972 Spider his
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Re: Mixing Engine Oil Weights

Post by htchevyii »

Should be fine, especially since they are the same brand, (same additives etc).
Trey
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1982 SPIDER 2000, 1964 CHEVYII, 1969 Chevy Nova, 2005 DODGE RAM, 1988 Jeep Comanche
1972 Spider, 78 Spider rat racer 57 f-100,
So Cal Mark

Re: Mixing Engine Oil Weights

Post by So Cal Mark »

mix and blend to your hearts' delight, the only thing that changes is the viscosity when you mix different weights
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SeldomSeen
Posts: 165
Joined: Tue Oct 21, 2008 3:53 pm
Your car is a: 2018 Fiat 124 Spider
Location: Lyons, Colorado

Re: Mixing Engine Oil Weights

Post by SeldomSeen »

So running Castrol GTX 8.75W- 37.5 is okay. :) Thanks much.
It's never too late to have a happy childhood - Tom Robbins

1972 Alfa Romeo GTV 2000
1966 MGB Roadster
2007 MINI Cooper S
2018 Fiat 124 Spider Classica
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