Geez, another Oil thread!

[GDI]

Ok, I want to change my oil in my '74 tii, and would like to do it this weekend.  I have receipts from the previous owner and they used "15W40 Rotella T".  I assume this is Rotella T Diesel Oil conventional, am I right?  I just want to make sure that this is what I want to do since my car is not a diesel!!  It would be nice to use since it is available locally.

 

This webpage has the following specs, which seems pretty good for ZDDP, no? 

 

17. 15W40 “NEW” SHELL ROTELLA T Diesel Oil conventional, API CJ-4, CI-4 Plus, CH-4, CF-4,CF/SM = 72,022 psi
zinc = 1454 ppm
phos = 1062 ppm
ZDDP = 1200 ppm

 

Am I on the right track here?

 

Thanks!

[1936spyder]

Yes, a # of threads already speaking to this already.

However since you asked and as I also have a '74 tii, Valvoline VR1 or Brad Penn racing oil (as it's the old Kendall GT-1 formula). Both have higher levels of ZDDP which is essential for engines of this vintage. As I understand, the BP has slightly more ZDDP so I prefer it. You can order it by the case off Amazon.

Sent from my LGMP260 using Tapatalk

[GDI]

Thanks for indulging my question 1936Spyder,  I appreciate it.  I think the essence of my question around whether diesel oil is a no no for the car.  I wasn’t able to find anything about whether it is a problem.  But if the Rotella is borderline for ZDDP, then I’ll keep looking. 

[irdave]

It's in my s14 right now...  It's good oil.

 

I used VR1 in my m10- If you can find it locally it's an easy choice.

Edited October 19, 2019 by irdave

[rcf925]

I just bought a 5 QT jug of Valvoline VR1 20-50 at O'reillys auto parts for $25, Thats the best price I've seen

[GDI]

I broke down and ordered the  VR1 10w30 Full Synthetic (black container).  Kept reading good things about it...

 

Thanks for the advice!

 

['76mintgrün'02]

1 hour ago, GDI said:

I broke down and ordered the  VR1 10w30 Full Synthetic (black container). 

 

10w 30 is pretty thin for these engines.

Some people use 10w 40, but I haven't read about people using thirty weight.

 

I use the 20w 50 VR1 (dino).

 

[jp5Touring]

20w50  VR1. I buy it by the quart at Menards when they do the 11% off rebate deal.  $4.50 a quart.

[GDI]

2 hours ago, '76mintgrün'02 said:

 

10w 30 is pretty thin for these engines.

Some people use 10w 40, but I haven't read about people using thirty weight.

 

I use the 20w 50 VR1 (dino).

 

Thanks.

 

Thats interesting, the manual recommends 10w30 as one option ( along with 10w40  and 10w50). For temps “usually under 50 degrees F”.  I am in Connecticut and we will usually be below 50 till spring.  

 

I think I should be good till I change it in the spring, no?

[Vicleonardo1]

Just bought a couple of quarts of 20w50 VR1 and my local Napa auto yesterday. Not really all that expensive, a tad over $5 a quart. (had to grab wiper blades and saw it on the shelf) I believe the zinc content is the same whether it is standard or synthetic. 

['76mintgrün'02]

I suppose.

 

Here in western Washington state, it only gets so cold in the winter.  I  just use the 20w-50 all the time.  It seems like the engine tends to run at the same operating temperature, with the only real difference occurring durring warm up periods.  I am always careful not to rev the engine above 3500, or so, while it is warming up.  Also keeping in mind that the oil warms up four times slower than the coolant, so the temp gauge can be misleading (I read that here on the FAQ).  The concern is that you'll get higher oil pressure with the colder thicker oil.

 

I do not have an oil pressure gauge, or oil temperature.  Just the idiot light in the dash and the stock temp gauge.  One of these days I may add one or two gauges. (I do love the AFR gauge).

Tom

[GDI]

Well maybe 20w50 does make more sense - it looks like my comment about 10w30 in CT drew some chuckles (thx,  iinca!). 

 

Now I really know I’m overthinking it!  

[jimk]

4 hours ago, '76mintgrün'02 said:

Some people use 10w 40, but I haven't read about people using thirty weight.

I;m "some".  Never used 20W-50 (in 49 years of ownership)

['76mintgrün'02]

4 minutes ago, jimk said:

Never used 20W-50 (in 49 years of ownership)

 

If you had to choose between 10W-30 and 20W-50, which would you choose?

[Flamingo 5]

Castrol 20-50 GTX