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Top up factory engine oil

Mine needs a top up but Nissan only sells 5 litres of fully synthetic for the z so i thought I'd just use mobil 1 as a top up as

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Old 04-04-2010, 10:48 PM   #1 (permalink)
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Default Top up factory engine oil

Mine needs a top up but Nissan only sells 5 litres of fully synthetic for the z so i thought I'd just use mobil 1 as a top up as this is one of the only oils that comes in 1 litre and meets the same specs.

Thoughts? The Nissan oil mentions not to mix oil brands on the back of the bottle but the manual doesnt say anything apart from ensure same spec...
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Old 04-04-2010, 10:59 PM   #2 (permalink)
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Originally Posted by willinsyd View Post
Mine needs a top up but Nissan only sells 5 litres of fully synthetic for the z so i thought I'd just use mobil 1 as a top up as this is one of the only oils that comes in 1 litre and meets the same specs.

Thoughts? The Nissan oil mentions not to mix oil brands on the back of the bottle but the manual doesnt say anything apart from ensure same spec...
Listen to the oil bottle...


It may not physically damage your engine to the point of complete destruction. But as a good rule of thumb, its never a good idea to mix types of oils, and then even more anal retentively, Brands of oil. If you need to top off, use the same as what's already in it. If you wanna change brands, do a complete swap and drain all the previous out.

Most modern synthetics have such 'special' stuff as they like to claim, that some mixes may have countering effects to eachother and well, in my engine is not where I'd want to practice that science experiment.
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Old 04-04-2010, 11:14 PM   #3 (permalink)
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Yeah but what a waste - the 5 litre bottle cost me heaps so I was going to save it for the 5,000km service... Also I'm assuming the factory oil is the same as what the dealer sells but no one really knows. I guess the Nissan oil is the safest option tho... Cheers
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Old 04-12-2010, 03:33 AM   #4 (permalink)
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Default Oil Top Up

My dealer (Blackburn Nissan in Melb) actually uses Mobil 1 5w40 ..... provided the label on the oil bottle respects the SAE rating called for in the manual, oils are fully miscible (ie - mix freely).
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Old 04-12-2010, 11:28 PM   #5 (permalink)
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My dealer (Blackburn Nissan in Melb) actually uses Mobil 1 5w40 ..... provided the label on the oil bottle respects the SAE rating called for in the manual, oils are fully miscible (ie - mix freely).
they use 5w40? say what???
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Old 04-13-2010, 03:10 AM   #6 (permalink)
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They use Mobil 1 5W30 (sorry bout the typo)


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they use 5w40? say what???
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